Tinfoil hats on, what if that "group", who might only actually be an "individual", wants seperate proposals only because it sets each for another scenario for contention.
OR, what if someone wants Schnorr+Taproot blocked like how Jihan Wu wanted Segwit blocked because it disables an exploit/covert-ASIC-boost?
Even if there were games at play here, I can't see it being anywhere near as fractious this time because there's not much left they can do. They know now that getting a bunch of random companies to sign an "agreement" achieves basically nothing. They know now that going ahead with a fork-coin just creates a weak and inferior chain that will likely need another emergency difficulty adjustment just to even barely survive the first day. They can probably tell that all the users who weren't fooled last time clearly won't be fooled this time either. We've got our FUD-busting skills refined and ready to deploy against any misinformation campaigns they might attempt. What's left for them to try? There will be absolutely no need for a small sub-set of users to react and start foaming at the mouth over another silly user-activated-stalled-flop.