*CHORTLE*
The Russian invasion would not be welcomed probably at all now, even if the Russians were rich and the West poor. The events of 2014 pulled together Ukraine as being antirussian. There was a narrative in the Right Bank that Russia was an evil oppressor. This was prior to even 2014. It was not accepted Ukrainewide. After the events of 2014, it has. A lot of people don't appreciate how much of a feeling of a backstab Ukrainians had over the Donbas and Crimea. The feel of it is very much Cain and Abel, if you are familiar, whether it is right or wrong.
That said, a world where the West was poor and Russia rich would have had Ukraine wanting to join Russian based institutions, trade blocks, etc. I doubt Russia would have invaded at all then. it's a wildly different world than our own. It would be fun to think about how it came about in an alternate history sort of way, but not what we have today.
On a personal note, we have extracted the family from Ukraine. They are in Europe now and we are trying to get them away from the border region. In all the darkness, there is a minute ray of relief for me. They lost everything, again, in a decade, but they are and will live.