Origins is by far the best of the lot. A proper party based RPG with stats, tactics, gear, role playing, great companions and a toolset for modding.
DA2 wasn't great, but it's better than Inquisition. The combat, while a vast departure from DA:O is at least enjoyable. The story, role playing, lack of options for race selection, no gear or stats are all detrimental IMO and serve as a clear-cut distinction of the end of old BioWare and the beginning of EA-BioWare. The copy/pasted maps and annoying companions didn't help it either. Putting a 2 on the title was amongst its worst failings since it was not in any way a continuation of Origins.
Inquisition...I suspect I'm about halfway through it and I'm not enjoying it. I don't like the 8-skills build (Guild Wars style) after the freedom of past games. The balance is absolutely appalling, crafted as tho an MMO and not a single player game. It takes an entire party throwing all the elements, shooting multiple arrows and slashing with multiple swords and daggers to kill the lowliest enemies. Combat drags on far too long and the skill level-up system is unrewarding and so. fecking. slow. Wandering around the different zones, which are all linear, chock full of invisible walls and obstacles make getting to actual gameplay content take 5x longer than it should.
The horses gallop/sprint barely faster than I can walk without it. Every zone is the bloody same; traverse rocks, pick up crafting mats and shards. Plant flag poles. Do fetch quests for NPCs. It is not fun. It is as tho they made all these maps and areas but instead of making them even slightly unique or interesting, they couldn't be arsed to put in any actual content and just put MMO style filler bullshit in instead.
I suspect Leliana is alive too, even if she was killed in DA:O and that world-state was imported. I saw a BSN forum post where the writer basically said "Yeah, live with it. That's how it is." So why bother having the import feature at all? I think this game was created by new, younger people who, under EA's rule, tack on multiplayer, add in micro-transactions, make an MMO with Dragon Age flavour and call it a day. I can't even get motivated to continue with it, and I've given up on the open world zones...I just want to bee-line the main quest and call it. A well-made but ultimately boring game that cannot compare to its 6-7 year old predecessor.