Improved playing won't help you at all unless you adjust your strategy to accommodate your new skills. For example, if you used to run three balls and now you consistently run 5-6, you are going to lose more. Why? Simple.
If you are playing rotation games, you used to leave your opponents 4-5 balls on the table a lot and then they wouldn't run out because they could only run out 3-4 balls too. Now you run 7 and leave them the 8&9 or the 7,8&9.
If you mostly play 8-ball, then you are running more balls and cleaning the table up better, allowing them easy run-outs and making them feel like heroes.
Basically your improved shotmaking is only helping your opponents.
As an exercise, go play someone cheap. Only try to run out if you KNOW you can run out. Otherwise, just run to where you can play a good safety and leave it there.
So your opponent might leave you a shot at the 2 ball (playing 9-ball). Instead of going for the out, make the two and three and possibly four, then play safe. Then let him do something and if you can run out from there, do it. If not, make the four and five and then play safe again. Eventually you'll get to a runout you like (even if it's just 8-9 or 9) and with ball in hand it'll be a cinch.
Just try this and I bet your winning % jumps a bit.
~rc
Suddenly you're making everyone look like champs because you can make balls better.