I think Game Freak really needs to either:
1) Change Hidden Power to use the higher of Attack or Special Attack
2) Make a new move, based on Attack, that otherwise works just like Hidden Power
It would help all of the physically strong Pokemon, that never use Hidden Power, be able to have an answer to their walls.
If they did that though, that would effectively mean the end of walls, which I think are a staple of the game. Basically every Pokemon would have a move that's super effective against the type they're weak against. As much as I would love to have an answer to Forretress and Ferrothorn's weaknesses, I love using Heatran as a special wall too much to make that sacrifice D: