The AAT has sold much better than the Podracers and I don't see it anymore, and the upgrades are actually very nice. That paint job isn't that exciting, but other than that, it rocks. Plus it's a "war machine" more than anything else from TPM and has crossover appeal for Clone Wars. It was a good choice by Hasbro.
Podracers on the other hand, collected dust the first time they were out in 1999, and back then they even came with figures. You can still find those on ebay for cheap. Hasbro was foolish to release these things again. Very few people care about podracers, or the pilots. It's one of the smallest niches in all of Star Wars collecting.
Just look at how bad the podracer figure set did at TRU. It's a pretty crappy set when you think about it. If Hasbro had put in something NEW into that set other than some cheap flags, it would have done better. Hasbro really conned TRU into that set. TRU puts that set on sale all the time but it never moves. It's almost pitiful.
Hasbro should be ashamed for what they've done to their retail partners, consumer base, and stakeholders.