I think I'd put this one as the best pony movie out there right now. All of the characters were well developed and actively avoided being simple cookie cutter arch-types that they could have easily been (bad mum 1, bad mum 2, cheating gamer, power trip pony, etc). The movie had a nice sense of humour and intelligent jokes that made fun of eye-rolling situations (Form a mob!). I vote Argyle for best parent. I mean, damn, dude really represents as the stand-up single dad.
I think the best thing I like about this movie, though, is the inclusion of a boy in the mane group and the story possibilities that can be derived from that dynamic. I am really looking forward to what G5 can show us.