I personally like the Jill redesign a lot, but the Claire one doesn't work as much for me. I think I've had a specific idea of how that character looks in my head since I was a child based off of the RE2 cinematics, from which the face looks slightly different just barely enough that my brain says "that ain't Claire", and I get that that's weird. I have a slight preference for the original outfits, but that's partially because they look more casual to me and I have childhood memories attached to them. It's really not a big deal. That being said, it doesn't bother me at all and I enjoyed the RE2 Remake and can't imagine actually complaining about it or whatever. Leon's redesign also looks a lot different to me, and I kind of prefer the original face from the CGI cutscenes, but this is probably just the cost of switching to real actors and motion capture as opposed to what I assume were fully CGI works previously.
People make such mountains of molehills. I don't really need a character's face to look a specific way or them to be wearing specific clothing when the point of the game is killing zombies and solving puzzles, and their new costumes make considerably more sense. I don't have ownership over the characters, either, so it's ridiculous to act as if any slight personal preference I have should really matter versus the creator's intent (and that includes the right of someone reimagining something to completely change it, that's *their* vision).
The only time I think I've felt frustrated was over Chie's voice change from Persona 4 to Persona 4 Golden, but that was admittedly because I grew pretty attached to the original voice and just never got into the other one even though I think it's a great and arguably more fitting take on the character.
