I just picked up DVD Packs 3 and 4 yesterday in Michigan - I am not as impressed as I was with the first two. There are a couple of great figures - but there is also wasted plastic.
Dusty - Quick Kick and Serpentor are great.
The Bat could have been better (paint on the claw part & metal bits are not as good as the carded version)
The cube - wtf?
skeleton dude - why do I need this?
Major Bludd/Cobra Commander/Snake Eyes - not really improvements
The Bat's spring loaded missile launcher - spring loaded anything sucks
While I agree that there are some serious duds in these sets (Serpy & Skeleton) I'd have to say that overall we got some vast improvements:
Purple Snake Eyes - cartoon acurate and awesome, just like his card art - my definitive SE
Dusty - didn't like his cloth piece so I took it off, overall the figure is great, only nit-pick would be that I prefer his v1 camo
Major Bludd - how can you say he's not an improvement??? The HISS Driver Torso is perfect, his mechanical arm now has 5 fingers rather than the mutant 3 fingers, and on a personal note I like his cartoon colours much better than his normal brown/black.
yes the BAT should have had some black wash paint apps, but it's still a BAT

I guess for me, I actually love the cartoon as a kid so to have cartoon-accurate figures is a huge win. IMHO sets 3 & 4 blow sets 1 and 2 out of the water. Sets 1 & 2 had a perfect Lady Jaye and cartoon accurate Destro, that was about it.