For many players, the simple case is that the whole board dynamic of battle cards doesnt seem to be that refined just yet
You can build and play with 20 card decks for battling in Pokemon Trading Card Game Pocket (PTCG Pocket)
Instead of stealing guys you kill them and gain life, you still blow up planeswalkers and instead of blowing up lands you make 3/3s so you always have stuff to do
When you incorporate a character, either as a creature or a planeswalker, make sure to have that character be the focus
If they dont, a spindown and a good attitude are plenty
Even though I wish the dash cost one (mostly because it would truly be a bazaaro Goblin Guide instead of giving your opponent a land, it costs you one), the ability to play it off the top with haste makes it relevant in the late game