The idea of making more things viable is a good one. So long as they don't kill the characters I have already built.
That is what killed my interest in POE. They would do a new patch and my old characters would no longer be viable. Yes they gave me a respec but I also spent a lot of time getting gear for the build in question. It seems that D2R is trying not to do that, time will tell.
New Runewords should be good. On the negative side they tend to make uniques less important.
Buffing sets and allowing upgrade should be interesting. As will making other merc viable.
On the whole it seems like they are making the right changes. Again, time will tell.