Yes, I think, they should not overdo the alcohol part. And yes, animations need work, not just with Wyll.
I see him drinking so much as coping with the stress of having to find Mizora, get rid of the tadpole and be confronted with Spike or his lackey, the one from the windmill, where Wylls hero mask slips the first time. And If I remember correctly, the first drinking scene is right after the windmill incident.
I can’t quite recall, though I think he might have the idle animation of drinking from a flask in camp even before he invites you to drink with him. I’m going to have to pay more attention to this in future!