My advice, if you want, since I am also using 40/40 for user contact/power.... user hits are okay, the home runs require a bit of effort.
What I've been doing is using the directional stick along with the power swing. The power swing without the directional stick often, for me, results in popups and some line drives, but not many home runs.
I wouldn't be so quick to jump ship. I managed to hit 4 homers with Pujols, two with Rasmus, one with Berkman, and one with Holliday in about 12 games. The real problem will be if the low power guys ever get one out of the park.