"How do you feel about talents that directly affect your rotation?"
I didn't read this question the way you did. Ability creep is a relevant point, but he asked specifically about situations where talent A is designed to be better than talent B, but makes the rotation more clunky or harder. From a feral perspective, the only talent i know is the "Dream of Cenarius" talent. It increases the damage on my next two melee abilities after i use a Healing Touch. As feral i have a chance of making spells free, instant and castable in all forms (Predatory Switness, also the same talent that makes cyclone so easy to use as feral). This means Healing Touch now becomes a rotational ability, and it means I must plan when to use it to get the most effect out of it. Naturally I want to get a 25% boost to my most damaging abilities whenever possible. For optimal use I should also select a target for the healing (which is not insignificant btw, 70-100k or so per cast)
This talent is also just plain better than the other two in the tier, and it appears it was designed that way. For the cost of watching for an extra proc, plan when to use it, and an extra button on the action bar, you get rewarded with slightly higher damage output and just under 10k hps on targets you select.
This sounds alot like the topic discussed before MoP, doesn't it? With talents giving players a choice between an easy mode and a hard mode rotation. I was a sceptic before, but it seems it works out. People selecting the two other options in the talent tree are not frowned upon, perhaps because the rotation is a fairly complex one to begin with. Or because feral druids are just awesome people :p