The Muscovite empire will sooner or later have to deal with what the Tatars, Bashkiris, Yakuts, Kalmyks, Karelians, Chechens, Dagestanis, Tuvans, Buryats, Komys, Chuvashis, Uralis and the 2m Ukrainians in Khabarovsk and Vladivostok will or will not accept.

As soon as Ukraine takes Tokmak and puts the resupply routes under fire control, militarized and gulag-ed Crimea starves. I wouldn't want to be the traffic cop on the Kerch bridge.