I agree about the "damage" as several of my earlier attempts at using thin resin Zimmerit resulted in quite a bit of unintended battle damage. LOL! I currently have a couple of Dragon kits with the molded-on Zimmerit, and I thought I would try using a combo of dremel tool and new xacto blade to simulate some missing Zimmerit.
As far as the seemingly odd choices for new kit releases these days, I'm can only assume that the various manufacturers are simply trying to provide some new material to improve their market share. I somehow doubt that spending R & D monies to develop an entirely new release of an older subject (Panzer IV, Tiger, Panther, etc.) would be very cost effective, even though we would sure like to see Tamiya do just that.
OTOH, there are so many vehicles out there that have yet to be released in plastic, like soft-skinned trucks, that I also wonder about their thought processes in releasing so many of the "paper Panzers" as mentioned by Mark. Sure, they're interesting--sort of, but heck, they never saw actual service. Personally, I would like to see some new kits of US WWII trucks that are only offered in resin at this time, or not at all. IBG recently released some new kits of early German WWII trucks that are nicely done.