Go ahead and do it! I'm still learning this game and frankly I could use a lot more of the feedback you're talking about - not just to point out errors but, if possible, to suggest ways forward. Whilst the odd 'well done' is very gratifying, it would help me progress a lot faster if more folk would pick apart what I'm doing now. So, speaking for myself, I'd consider it a favour if someone took the time to that - they would get words of thanks, not anger!