Because he's a better skater than Johnny could ever dream of being, especially SS wise.
And IDK if you've noticed but Johnny and Tara only talk about their wonderful skating that never was wonderful. They hate anyone that's not themselves LOL!
Messing is not a better skater than Johnny was. He doesn't have the smoothness, carriage, stretch, attention to detail, or emotional depth. No way he could effectively skate to Otonal, The Swan, Fallen Angels, Child of Nazareth, or Lady Caliph. He's a fast and fun skater though.
Johnny and Tara can be annoying commentators (mostly the latter), but they don't hate everyone.
I'd like to see Keegan try a more powerful kind of music instead of cutesy.