The problem with many outfits or armor in BG3 is that they are too costumey. Too decorated. They don't look or feel like clothes these characters would actually live or travel in. Even starter gear like the Druid Leather Armor. People who live in the wilds don't wear costumes. They wear utilitarian outfits that show a little wear and tear. Nobles in Baldur's Gate might wear costumes and fashionable decorated outfits, but in BG3 everyone does.
Some designs, like the basic Leather Armor or some stuff the NPC's are wearing look more believable. Like the Breastplate Aradin is wearing.
Overall I'd say Larian's designs lack situational awareness and tend to be too overdone and too costumey.
'Too costumey' is definitely a complaint I can get. Some of them are fine I think-the Leather armor and ringmail (after Larian went over it and changed the color palette) look pretty utilitarian to me. Others not so much. The Padded armor (both the default and Asterion's) are really flashy (although I admit I really like the look of both of them as 'fashion')
Things get really 'fantasy armor'-ish real fast when you start taking into account enchanted armor though. Stuff that makes Lae'zel and Shadowheart's armor look subdued and functional. Even the chain shirt and scalemail, which look pretty OK-ish to start with get pretty silly with some +1/2/3 modifiers on them.
I'm not a huge fan of the druid armor, but I do like that the Druid and Sorcerer got unique starting armor that makes playing them feel a bit more immersive. I think it would be marvelous if this got extended to the starting classes as well and maybe even some races like drow and gith. I don't know how likely it would be though.
I'm also a little concerned that whether you like X or Y aesthetic, we are all going to look like clowns at endgame anyways, wearing whatever has the best stats-because the idea that all of these different 'looks' are going to keep getting upgrades over the course of the game seems unlikely. (drow is the most 'supported' look with three varieties, but even then, it's all based off the same armor set with parts added or removed/recolored, all light armor, and nothing with a +1 modifier or better)