There is no probs with having a bit of a cam in your turbo A12. It seams the turbo is fairly small if its boosting at 2k. Turbo restriction could be an issue when you rev it up a bit. There is a couple of ways to improve things.
A larger turbo will help by freeing up the exhaust and preventing too much reversion because of the hot cam. This will also help prevent detonation.
Going to a smaller cam will also help prevent reversion, but will cost power.

I run a huge cam on my turbo A12 and it loves it. I turn it to 7500 RPM with standard bottom end. When i had a standard cam, power would fall off at 6000RPM

You should be able to turn it to 7k+ , especially if it has uprated valve springs. But the small turbo may be limiting power up that high.

If is only a cruiser, maybe go back to a standard cam and keep it to 6k. If you want more from it, keep the cam and go a bit bigger on the turbo.

Keep us posted, I love turbo A series engines!