I like the set too...
First, a hooded Han in a brown coat was important, and I plan on removing the goggles so they can be moved around properly. I'm irked Hasbro glued them on like that. Otherwise a pretty great figure. I'm planning to combine my blue one with the brown one to make a decent figure.
I'm not totally disappointed in the Chewbacca... I almost wish he had no snow deco so we could've used him elsewhere, as I have a snowy tall Chewie already. I love that sculpt and would love to own about 3 more of it for various scenes.
The R5 is outstanding, and while I wish it didn't use the vintage body, I'm ok with it too and I dig droid repaints.
Like above, I like K-3PO because it's a repaint and also it doesn't totally negate the original figure. Getting K-3PO pre-blast damage and K-3PO "dead" is pretty cool I think.
Probe Droid... Meh. It's a repaint of something I never was that interested in originally, but it's ok I guess. A new Probe Droid would be ok if it was up to modern standards, but honestly I would've rather gotten something more interesting than the probe droid. I get why it was in there though, it sort of made the set what it was, and so I wasn't bothered by it.