Ye gods I hope the next (eventual but hopefully not appearing anytime soon) edition of D&D doesn't go the way of Palladium. I like having a nice consistent set of rules as a common framework, one that can be tweaked if needed, but provides a solid foundation for how the game is run.
Palladium has very little of that, if any. As was said in another thread, Palladium was an "improvement" on the D&D ruleset of the day. However, I personally see v3.X of D&D as a far better improvement on the basics of D&D, taking into account lessons learned over the years, something Siembieda hasn't done and from the sounds of it won't ever do, becuase he's convinced that he's absolutely right and nobody else has a clue. If anything, I'd say WotC has one-up'd him in the realm of "generic tool-kit" by means of d20 Modern, which can easily be changed to any type of setting (admittedly some work better than others) and has a consistent rule-set. Wouldn't be too surprised to learn that a lot of the RIFTS d20 fan supplements use d20 Modern as a baseline, with the OCC/RCCs being Advanced Classes or just separate races.
Personally I hope that someone else snags the license for a Robotech RPG, becuase while I'd like to play in that setting, I don't want to have to learn somebody else's house rules to do it.