Probably, but there are two troubling factors in play:
1. Putin makes mistakes like everyone else.
2. Putin may not be able to stop due due to internal factors.
Contrary to popular stereotypes, there is little popular support in Russia for serious wars or conquest of unwilling foreign countries. As for mistakes, reducing the current level of tension would make the effects of these mistakes less costly
Yes, but the combination of EU and US influence, plus popular anti-Russian feelings in nearly all Eastern European countries, makes this very unlikely. Even Belarus is trying to balance between the EU and Russia.