[@Metamore]
I've slept on the whole Stat move thing and I'm now going to make an adjustment. 

Like you insinuated, stat moves themselves shouldn't get a 50% boost. They are meant to support the next move. So this is the new system for stat moves:

Stat moves no longer gain a 50% boost on their roll. Instead (if they are effective) the next roll for that Pokemon will be boosted by 50%. [b]Also[/b], all "damage" that a stat would do is transferred over to the next roll (if the next roll is favorable).

So basically, everything stays the same as before, except the 50% boost is pushed to the next turn, not the stat move's turn. 

This will be the new system going forward. All past rolls still stand.