I no longer army build PT-based figures. In fact, I sold off pretty much all my PT GAR and Separatist forces; though I admittedly had a very small force compared with you guys.
The recent advances in articulation of OT army builders, like Snowtroopers, Stormtroopers, Tuskens, etc., have made it almost irresistable for me not to army-build them. I never imagined having a super-articulated Spacetrooper figure, for example, much less the 5-10 I now want. I find myself snapping up the odd Snowtrooper and Spacetroopers whenever possible; and though I am pleased (and surprised) to see a new AT-AT Driver on the way, I have no plans to get rid of the 15 or so Saga AT-AT Drivers I have. I love that figure!
Hopefully, the coming AT-AT Driver figure heralds something big on the horizon... though if a new AT-AT ever comes down the pike, it may well be the last "hurrah," as consumer budgets continue to shrink and the price of plastic (read: oil) continues to rise.