What they are very likely to get is lots of money for their defense establishment. Money is very easy and goes very far in Ukraine. The Ukes should easily be able to maintain a much bigger and better active and reserve military, very quickly.
Russia has no option, should it try to threaten Ukraine again, but to do it with a reformed conscript army, as their active force won’t have the numbers (as we see today). Add to that military reform will require massive social reforms in Russia.
It sounds like you believe all this stuff about Russia luzing so many men, basically luzing this war. I doubt it. The Ukes wouldn’t need a guarantor if such was the case.