Ehh. Not great breakdown of the three camps you've identified the last two largely overlap (if they were distinct camps I would reside in both) and the first camp "people who want BG3 to be more like DOS" has perhaps 3 or 4 members. There as many people calling for the return of the 3.5 ruleset as there are advocates of cooldowns and action points.
There are some pretty direct opposing wants between the BG1/2 camp and 5E camp though.
RTwP vs. Turnbase per 5E RAW
BG style adjusted monsters (including hp increases) (like in BG2) vs. Monsters implemented as RAW 5e
Okay with adjusted rules vs. rules implemented RAW (BG1/2 were far from 2.5E RAW)
No skill check (and thus no content lock) vs. skill check in dialogue and game (thus locks content)
Single character focused narrative (THE chosen one) vs. the table-top-esque group dynamic narrative of BG3/5E PnP (group of chosen ones)
With that said, it's totally valid for someone to say - I'd prefer a BG3 that's true to BG1/2, but if I can't have that, I'd rather have 5E RAW than Larian's invention. Which may be how some people can identify with both of those camps over the DOS/Larian camp.
Also, sometimes I have seen some instances where some people of these latter 2 camps are simply united more so by their distaste of Larian/DOS, than actually being on the same page (i.e. both camps may say this game is basically DOS3, etc).