I miss my TFC grenades. As a medic, once I finally managed to learn how to time my conc grenades, it was awesome. On one map (Flagrun?) it wasn't unusual for me (and my fellow scouts/medics) to be able to take on three to four sentry guns, three engineers, and another defender or two, by simply conc jumping in and out of the flag area. I think I have one screenshot, as me playing medic, where my score was something absurd due to flag caps. Like 180 where the next person down was *only* 112.
That said... that's why I think it's silly to readd grenades back to TF2. I think, the game right now, is pretty well balanced as a *team* game. You're not supposed to be able to MIRV your way past sentry guns or just EMP your way through (I sure miss that though!) a group of enemies.
You're supposed to use your teammates with the variety of skills everyone has, to work together, to accomplish your goals.
I miss the grenades. But I like TF2 better.