First, I think its the first game of this type to have any successful control scheme for a controller at all, so I think it deserves accolades for making it happen at all.
Second, while I still mostly play in traditional mouse and keyboard, I am an old man now, having played the original BG as a teen when it came out. Having the controller as an option is huge for me when I am in pain.
Anecdotally, my partner never played these games growing up and she fucking hates trying to play with mouse and keyboard. She says it feels clunky and slow and confusing.
Is it the best? No. Is it an excellent effort? Yes, because it actually works.
The fact that a game with a ruleset as complex as DnD manages to have a couch co-op option and gamepad controls built-in is an achievement, imho.