I played and didn't dislike it, but I wasn't very good at it. At all. As in, I was terrible at it.
Skill level in Tribes games depends heavily on movement. The same is true of Quake and Unreal Tournament to a (IMO) lesser degree, but I have a feel for the movement in Quake (and Quake also relies more on player prediction with the rocket launcher).
So I agree it's a solid game. I just didn't have much fun playing it because I was so bad at it.
I will say that I did like Hi-Rez Studios' previous game, Global Agenda. I haven't played it since it went free-to-play, but before that, it was quite fun and I felt like I could contribute to a team without being "uber-l33t" and spending hours every day practicing.
So Hi-Rez is a solid studio and Tribes Ascend is a solid game. Just because I didn't have fun playing it doesn't mean others shouldn't try it!