The problem with this fascination with automation is that pilots rely more and more on it and lose their handling skills - look at airline pilots as an example.
I'm not saying that knowledge and use of the AP systems (whichever flavour you have) is bad, it should be encouraged so that pilots don't get lost in the levels of automation but regular practice in the 'raw' aircraft should be equally encouraged.
I expect my pilots to be able to hold an accurate angle of bank manually and roll out on specific headings the same way - but also be able to use the higher AP functions to achieve the same thing when required.
The whole point of an AP is to reduce the workload on the pilot but if that workload becomes so low that there is no arousal level then reacting to something like an unusual attitude will be slower.
If a pilot is in the habit of letting the AP drive him round the sky and stops monitoring the AI, it doesn't take much turbulence in actual conditions, especially if he is head down reading a plate for example, to induce the leans.
Frankly the issues of trimming or not trimming into the turns will depend very much on which flavour of AP you have and your personal preferences as a pilot - trying to dictate which is 'right' or 'wrong' isn't an argument you can win.