It is strange that you plan to remove some hulls in the upcoming 3.5.0 version. Any specific reason for it?
Avalon: Weird sprite, pointless with the cheap-ass Condor and even cheaper Chengdu available.
Tundra/Vista/Sloop/Summit: Weird sprites, also rather redundant especially with the recent vanilla ship additions.
Tick: The Nautilus exists.
Camel: This one isn't permanently removed; it will eventually get retooled into a Mule (U).
Kestrel: Overlaps with Falcon, Eagle, Vulture, and Heron. It really didn't need to exist.
Locomotive: You can just use multiple Oxen. It's not like there's a fleet cap in SS+ anymore.
Bull: Mudskipper Mk2 and Buffalo Mk 2 - mashed together. Didn't really merit keeping, since the other Pirates+ ships are getting sprite updates.
Sentinel Wing: Let's be honest. Who actually used these?
Some thoughts....
Avalon: Is imo worth keeping as it fills a distinct role - that being a frigate scale carrier. Maybe the sprite could be altered to make it look like a stripped out and converted Alastor so it doesn't stand out like a pristine white brick? The concept however, I think is pretty sound and useful.
Tundra/Vista/Sloop/Summit: Yes. They are not especially compelling any more given the recent additions.
Tick: I don't think the Naut existing necessarily invalidates the Tick's existence any more than the Hound invalidates the Cerberus.
Kestrel: I never really got a handle on how to use this ship tbh.
Camel: Mule (U) will align it with the Sunder and build a little SSP lore.
Locomotive: It was a decent enough idea that I sadly never really saw the point of using - it's slower than the Ox, and you don't get any efficiency savings for your greater expense and upkeep.
Bull: I'll actually be sad to see this quirky thing go, but if it's role is going to be covered elsewhere....
Sentinel Wing: No-one in thier right mind would use these except for a lark. But I still think they should be kept (in some form) because they make pretty decent antagonists as they are such a nuisance to fight around, given thier ability to straight up negate missiles (usually at the least convenient time).
Also, new Archer looks much nicer.