I put probably over 100 hours into Inquisition and it was the sort of game that really peaked at about hour 30 or so and just slowly declined after that. It has all the typical modern BioWare writing which is what it is and I'd more easily recommend Inquisition if you already played Origins or DA2 and were invested in the lore or characters. Since you haven't played Origins or DA2, The Witcher just does so much stuff right that Inquisition completely got wrong in terms of marrying engaging story into an open world.
I guess on the positive side, Inquisition looks real nice. The main quests are ok but like I said, even with the main plot stuff, it really peaks about 1/3rd of the way into the game. The combat is pretty mediocre and just so many of the systems in place like customizing your base and character progression feel really half baked and poorly implemented with a terrible UI to boot. But the side quests are complete garbage. And unfortunately, you'll be forced to spend a fair amount of time grinding out some amount of the B-tier MMO quality side quests in order to unlock the main quests.
The Witcher just got so much right that Inquisition got wrong in terms of setting up an open world RPG with story. So much of Inquisition's quests would basically be the equivalent of clearing out monster nests or bandit camps from The WItcher, except BioWare had the gall to formally qualify that rubbish as actual, proper side quest material. And then they just recycled those same exact quests across about a dozen maps.
So yeah, if Inquisition came out in 2015 I don't think it would have gotten anywhere near as much praise and hype as it generated. If you want a pretty looking semi-open world RPG, sure, go ahead and play it but be prepared to get burned out on it pretty quick if you don't like quests that amount to "Close 10 portals."
I will say that the Trespasser DLC for Inquisition was solid though. If only they had the rest of the main game more focused like that. But if you want a good Dragon Age game, play Origins on PC.