Welp, guess I've put it off long enough. But apart from everything else people have said, one thing I want to add to the mix is that like I've said many times before, we have so many companions to pick, one of whom was added (as a companion) at the end of October this year, and with so many of them and only two free slots for companions, it's a buyer's market and he just doesn't have enough going for him on that front.
Etheryn is a top tier character for me right now because she has so much going on, from personal development to her relationship with the Champion, that she really feels like the most multi-layered companion available to us. It helps that despite being a dickgirl, all her content centres around her butt and the player fucking it; I think she's the big reason I like assplay now.
Just below her are Brienne, sub!Arona and Kiyoko (in no order). The former two hit my sweet tooth for amazons with tough outsides and soft gooey centres, and both have great use of pregnancy and lactation content which is wonderful; the latter loses some points for being kinda cold and aloof towards everything to the point that outside of interacting with other Kitsune she seems to be in a bubble at times and literally was at first, but within that bubble she combines all the fun of pregnancy kink and more involved parenthood than just "Babies in the back of the inn lol" like most offspring get, and Kinu is the perfect Daddy's little girl archetype. Plus there's at least some interesting stuff involving the Old Country and the culture clash that comes from the Kitsune's interactions with the rest of Savarra.
And so on, with a "Good but not great" tier for Azzy and Tui (Also soft-hearted musclegirls but there's just too much overlap between them and Brienne/Sub!Rona and none of my other kinks really come into play, at least they have heartfelt loveydovey interactions too) and Brint (poor guy is just not at all what I'm into sexually, but his carefree personality and best bro vibe make him worth keeping sometimes, and I do love how he breeds a Champ with a cunt), then a "I don't like or dislike it that much" tier for Cait (Cait was a fav of mine back in the early days but being around for so long has given me ample time to get really sick of her, but even with that she's cute and fun, is a good friend, has a decently complex character and content block and at least isn't too insecure to let me fuck her ass), Agni (sex scenes got kind of old, and for some reason a lot of extant companions don't have comments about her which again makes her feel disconnected, also her class is a bit weird, but I do like her backstory and personality at least) and companion Viv (literally just her NPC sex scenes and content with her house being stationary now, I was expecting a lot more) and then at the bottom, Berwyn and Quinn who just weren't that interesting to me ever.
But if you asked me if Berwyn was a better companion than Quinn, the answer would definitely be yes. Berwyn had a better personality, a better class and powerset, a neater costume and at least a more compelling backstory. Sure "Femboy with an elephant trunk between his legs" still isn't my thing, but he had all that going for him. Quinn just felt gangly and directionless. I still haven't checked how to get his new set because it just doesn't feel at all like a priority. Apart from the bit in Winter Wolf where you're on the ship and need to be sneaky and he helps you avoid strikes, I've never had a moment while playing this where I thought "Boy I bet Quinn would be an ideal party member for this situation" over another. Frankly, he just doesn't stand out to me in any meaningful way.