Tactical camera. Why on earth can it be obstructed by scenery? It just makes no sense. It was just so clunky to use that I think I only ever really used it in boss fights to split up my companions. I don't think that I ever used it in a normal fight. What was wrong with the DA:O system? That seemed like the most intuitive and useful iteration of this camera, so why needlessly change it?
The loot. I think that crafting is part of the problem here. Sure, it can be avoided by simply saying "just dont craft anything", but when you can craft something that is leagues better than what you can loot, you have a problem. I also found that most of the armour looks the same, just with a few extra scales here, or a cloak there. Unless you are using one of the more unique armours, such as the Grey Warden gear, you mostly looked the same no matter what class you were. I kinda wish that there was some more variety in the armours, or if you could use some of the companion's styles.
The War Table. This thing has so many problems. You send agents on missions, and then you wait X amount of time for them to be completed. This is usually the kind of thing that you would find in a companion app. This could have been improved in two ways:
1) Actually have some input other than "send agent to do X". What if you actually went to deal with these bandits, or what if you actually spoke with some of these nobles or characters. It would have allowed so much more interaction with the world or with some characters from previous games. I would've loved to speak to Aveline, King Alistair or The Hero of Ferelden, but instead I got to read a wall of text.
2) Give some decent loot. Great, I sent this group of people on a six hour mission, and I got a terrible weapon and about 100 gold. What a great use of time for me and for the Inquisition. Hell, I contacted the Hero of Ferelden from the first game, and I got a letter and a fucking belt.
Too many resource nodes. This is one of those times where I feel like more is less. When I played DA:I, I can say with certainty that I spent most of my time running around and collecting resources, and it isn't fun, but I feel like I have to do it to be efficient. It would have been so much better if the resource nodes were fewer and further between, but you got more of a material for collecting it. It just feels like ME2's resource collection otherwise. Grinding for mats and doing busywork is just not fun to me. Also, fuck the shards.
Stripping away micromanagement. One step forward, two steps back. We got armour customisation back for companions, and that is great (not that it should have been taken away anyway), but why did they remove the point allocation and gut the tactics? Sure, not all players want to micromanage their characters, but that is what the "auto-level" button is for, and in previous games, the AI did a pretty good job at using their skills. If I want to control what my companions wear, how they level up, and how/when they use their skills, let me. Automatic point allocation and "use skill Y/N" is not enough.
Pointless zones. Inquisition has 13 zones; three are hubs, one of which gets removed, leaving 10 leveling zones. Of those 10 leveling zones, only 3 (three!) are used for the main quest[footnote]There are also some other "side" locations used for the main quest, like the Arbor Wilds, Theirinfal Redoubt and The Fade, but they are relatively small compared to the other locations in the game, and they cannot be revisited. They are more like "levels" than "locations".[/footnote], leaving 7 to be used entirely for the side quests (with one being used for that pointless shard adventure), and a few of those 7 for companion recruitment. Of those sidequests, none ever really feel like they have an impact, and many end up being "kill X" or "find X". There was one notable instance of a quest in which I walked into this random woman's house, and without any form of introduction, greeting or "get out of my house", she starts telling me this really personal story about how her husband was killed by Templars, and without her asking me to do anything about it, and without me even getting the chance to offer to help, I go on my way and the game expects me to do something about her husband's death. I wasn't even the Inquisitor yet, so for all she knew, I was just some random person who walked into her house with a bunch of weapons, and she starts telling me a story.
Have previous choices matter. You look at the Dragon Age Keep, and I expected to have every single one of those choices reflected in Inquistion. In reality, I can recall only a handful of instances of "oh yeah, I remember that choice.". Where were all of the returning characters? That is what I missed the most. You don't have a huge cast of companions from previous games and then only give some of them a passing mention.
You may think that I hate Inquisition from all of that, but I don't. I loved that game. This is pretty much tough love.