xhonzi said:

As was already said- it's nice that clip shows more soldier vs soldier action... it helps balance out the ewok central focus.

Can the colours be still improved? Or is that about the extent of what can be done given the quality of the source?

By colors improved, do you mean just that scene? I have tried my hand at color correcting some ESB scenes, namely the Wampa ones, the Luke/Leia on Hoth one, and the Han/Leia Hallway one. As said in my signature just PM me for links.