To me what's disappointing about this game has a lot to do with the story.
I think doing open worlds(in this case, semi-open world) and a good, captivating story at the same time is extremely difficult to do right. Also, from my understanding the game started as an MMO. Which I can really feel the elements of that in there. The world for DA:I Is very gorgeous, but the story suffers so much as a result. The story is so in the background and so light and safe, you forget it. 80 hours into the game I overheard an NPC say I ended the Mage Templar war and I was completely confused when that had happened. I thought it was still ongoing and I just picked a side to fight along. Nothing is very engaging, the only thing that really made me want to replay is to see the other side of the Mage/Templar decision, but I can't be bothered. I even know I can look it up on youtube, but I'm very meh about it.
The whole story feels extremely safe too. They were really afraid to take too many risks with this game or have too dire of consequences to choices. Even that big choice everyone has freaked out about that involves two characters from previous games. That is extremely easy in retrospect. Literally it affects nothing but potentially a players personal feelings if they care about both of the characters(which the majority of the time, they really are not going to give two shits about one of them). I doubt they'll make it do anything in the DLC because they won't want to make people replay this game for that other person. It's probably a result of the overwhelmingly negative feedback with ME3 and DA2. They have literally caved to what a certain portion of the fan base has wanted. A lot of real easy black and white choices, a barfing quality happy ending with a party of people making out with your ass and a sunset, and finally to feel like the unstoppable perfect god that can't do anything wrong (especially if they are being "morally good").
Also, let's not forget how some serious personal stuff for the Inquisitor happens in stupid war table missions. From my understanding, the elven Inquisitor's entire dalish clan be massacred and there is absolutely no reaction in the main game to it. I know for my playthrough, I was pretty shocked when my qunari Inquisitor's mercenary team was rounded up by crazy fanatics and were nearly all massacred, three or four of them die no matter what you do, and there was absolutely no reaction in the game. Oh hey, everyone you know and love is dead. Isn't that moving and dramatic and deep, lol, moving on to the next random moving and dramatic and deep thing.
The companion characters all felt very shallow and incomplete. I was really looking forward to all of them, only to spend the entire game wondering when I'd actually get to know them. Apparently a lot of their personality is in their glitched out ambient conversations out in the fields. Which was a horrible choice considering they can't set up easy conversation trigger points in the semi-open world like the previous games. Once I finally got the companion side story quests, I'd think that was the just beginning of their story only to realize no that's the end of their story unless I romance them. It was like Mass Effect 2 all over again. And if you couldn't romance them, it was like meeting Aveline at the beginning of DA2, and not learning she had a husband until the third act where she brings you randomly along to see him slowly dying of blight. Then she makes you decide whether she should do the stabbing or you should do the stabbing. Afterwards, she just shrugs it off after a little pep talk and then tells you how wonderful you are.
I was really annoyed by all the over the top hero worshiping. Literally, half the stuff the Inquisitor does is handed to them and the other half are complete accidents. Yet everyone acts like the world would have ended without the Inquisitor because the Inquisitor is so amazing and perfect and amazing and perfect and god like and amazing and perfect *everyone breaks in fanatic religious singing.* If you ask me, the world would have ended with the Inquisitor if they were not given all of the Elder One's plans and most of the supporting characters are just blind idiots rushing towards a cliff.
If you play a morally "good" character, you can make people change their opinions on a dime just because you're nice. There were so many times I thought I was about to get an argument because my Inquisitors views were different from a companion characters, and then be utterly surprised that the other character would be like "Nah, you're right. I'm wrong." Hardly any argument at all.
That whole rivalry function in DA2 has me spoiled rotten. Cause here's the thing, people can co-exist and not agree on everything. Your closest friends can be the ones that make fun of you and call you horrible names. Your closest friends can be the ones who call you out when you make a mistake, or dare to call you out even if you are right. And you can make horrible mistakes when you're a good nice person. Even with some of the romances it was just real, because real couples do get into arguments a lot and then make up later and are stronger for it.
Also, it was just incredibly nice in DA2 to be playing a small time hero. Why the hell do we have to go about saving the entire planet or entire galaxy every time. It's just boring. I was talking to my friends about how Hawke is obviously the weakest of the three Dragon Age heroes, but that's what makes them the most interesting of the three. And unfortunately it seems like the fan base wants the same old boring stuff.