More armors/movesets for companions which only have the one! I realize these often go with tf plot lines or even new busts — I've been wishing for a berwyn (re-)masculinization plot for ages, which would probably lead to an upgraded kit, but I know that takes a lot of work and writing which I'm not at ALL entitled to demand lol.
That said, it would be nice to have more variety in terms of what roles in the part characters can fill. I almost always play with Brint and Berwyn in my party because I like their abilities a lot, but that means I usually have to play white mage so we have a source of healing. It would be neat if Berwyn or Quin had a more support-centric kit so players who prefer male companions can bring a cleric around sans Cait.
Also, just throwing it out there, but I'm always a fan of more masculinization-y content or transformations for male NPCs. The game is slightly more limited in terms of how you can change the player character (compared to TiTS, for instance), and partly because of that getting the change NPCs is just an extremely fun part of the game and one I wish was implemented for more characters.
OH also this might already exist, so tell me if it does, but it would be nice to get non-staff weapons for spell casters from an RP perspective! For instance, I wanted to build a kind of lycan druid type character in a recent playthrough, with the idea being that he'd start human and take a lot of lycanthorn and plant tf items, and use a mix of healing magic and nature-y bow abilities, but equipping most bows meant my healing got kinda slashed. Just from a purely aesthetic/RP POV it would be nice to mix and match more, since we can do that so much w/ powers.