I play PLO8 tables ranging from $25 to $200. I actually play more hands at the $25 tables because the games are generally looser and I figure the players there are bad enough to pay me off if I connect with longshot hands. I find it frustrating playing speculative A45x hands, and folding ~90% of the time on the flop. Then when I actually connect with a flop everyone folds to my bet. That's a big difference at the higher limits. People tend to play better. I know it's obvious, but it's very very true. Beating good players is a lot harder than beating bad players.
I'd say, "Test everything. Hold on to the good." For big-bet games like PLO/PLO8 or NLHE there are many different winning styles. Some styles do better in different game types and being able to adapt is the sign of a truly skilled player. I think you'll benefit from trying different things. Try playing more hands and see how it goes. Your success with depend a lot upon how well you play post flop and especially the qualify of your opponents.
There was a time when I studied a lot of Ribbo's hand histories and tried imitate his semi-loose aggressive style. I didn't have much success and felt uncomfortable the whole time. Some elements carried over as I gradually shifted gears back into my natural playing style. I then started to win again and felt I had a better overall understanding of the game. Wintermute had a nice post over at 2+2 talking about some issues regarding this topic.
http://forumserver.twoplustwo.com/showt ... er=4734384
Wintermute is one of the few players who plays in the $2k game that openly talks about his thoughts. So I thought it was also very interesting that since he's started being able to beat the $2k game regularly, he now claims he can't go back at beat the $100s any more.
http://fundy.livejournal.com/8491.html? ... 683#t16683