From your comments I'm guessing you don't bowl on a league. Nothing else prepares you for bowling on fresh conditions like being a member of an league. I can't tell you how to increase your rev rate especially without seeing you bowl but a few things I pricked up on from reading what you wrote.
1. Did you move right of 10? the first thing you have to do is find the hook on a lane if your normal shot up 10 isn't working move 1 board right with your feet and 1 board right with your target until you find the point where the ball will hook. If all else fails stay in your original spot and move your target left until the ball gets to the pocket.
2. You mentioned backing up on the approach did you try moving forward on the approach? In my opinion moving back increases your ball speed the opposite of what you want on heavier oil where the ball needs to slow down. This is hotly debated some people believe the opposite that moving back slows ball speed my advice is try it see what happens for you.
3. Accuracy is highly dependent on timing you should ask your coach for some drills to help you improve yours.
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