Forgot to mention a couple things.

1- They are far easier to click on. More square, and less "thin noodle-like" than the default frame, which in arena... is like trying to click on a needle with another needle.
2- They are more stable, and dont bounce around as much. I suppose you could run the "overhead" addon as well (which filters out pet/totem nameplates, leaving only players). Depends on preference, I am going to try running just Tidyplates for a week and see how I like it.