Time Spiral removes itself from the game, which does not allow you to infinitely recur drawing seven cards, as you would with Timetwister (see further down the list)
For one player it sure is
Trample matters is an interesting theme to build around, but its also very Gruul
Finally, the deck features a handful of powerful removal spells and burn effects including Lightning Strike and Hurloon Battle Hymn which can push through lethal damage, or deal with your opponent's early game threats
Overlord of the Mistmoors Four mana for two flying 2/1 tokens is a fine deal for a token generator in white, but I need a bit more to be excited to play that card
You can try to make this somewhat one-sided with Sahagin or Ultros, Obnoxious Octopus, but it looks solid in any deck