Picked up Kingdom Tigatron. Aside from the tail "weapon" being lame (as the vast majority of "put it in the hand, it's totally a whip" tend to be), he's pretty good. Just had to browse through the three on the shelf for the one with the least derpy tiger eyes.
Not that I've really noticed. I don't have Cheetor to compare, but Tigatron seems fine as long as you're not too extreme with posing him. And if you're going that far, you'd probably use a stand anyway.
It's weird. Since Megatron's original alt mode is completely off limits but there's precedent for a variety of very different alt modes, you'd think the designers would be free to go nuts. But they don't.