Wonderful stuff, CHEWIE! Wow, adversity seems to bring out an even higher level of work with you.

First off, I was really sorry to hear about Kirby, too. He was the man. Sometimes the brightest stars just burn out faster.

Anyway, on your 501st, I can't really say much on these other than that I think this is what Hasbro should have given us. I don't know if I'll ever forgive them for saddling us with the AT-TE sculpt for that figure. There's always hope, I suppose, for SA 501st, but I'm not holding my breath.
Clone Armor Mace is AWESOME. Great choice of head sculpt, as we can be pretty sure that when Mace has to don armor, it's going DOWN.

Hagen Daas is too cool for his name, man. Great use of head there. You know, that could VERY, VERY easily be a young Dooku...

Can't say a whole lot about Jolan Karr other than the head repaint looks really good, and that's a nice use of the Mace body.
The Clones in Jedi disguise are amazing. The facial detail (I'm not sure if you did that or if it's just the pic) makes them LOOK like they're waiting to ambush someone. Brilliant.
Aayla also looks awesome. I think your point on the bulk of the armor is right on. It might be the shoes? The use of the skirt is a nice was to minimize the scale difference. I really like her this way.
The final Mace, well, he's damn near perfect. Why Hasbro hasn't stepped up with an ultimate Mace escapes me, but if they do one, I'd suggest they steal your recipe. Nice job.