Hey,
I think everyone has different level of experience. I play on World Class with CPU shot error at 10 (User at 55 and score quite a few goals). I have also changed the team tactics sliders (which I can't see anyone has mentioned?). I use custom tactics which enables you to edit the sliders and up the shooting to at least over 67 (which then changes shooting to lots, I have edited all teams in EPL to 73 and all other big teams around the world) and you can also adjust the attack build up speed (around 50) and passes (also around 50) which makes the team attempt riskier passes. It provides a description for you in the tactics as you highlight over each one. Note though that upping the shooting will make some teams shoot from outside the box more often which you may find unrealistic? I love it as it gets the CPU shooting more and makes me try to defend better.
The sliders I have isn't perfect but the CPU attacks a lot more although it still could be better as the lower teams sometimes seem to attack more than the big teams.
Cheers