It's difficult to gauge so early in her comeback, but I personally thought Henin didn't play too well against Czink. She persists with an aggressive approach but atm is making a few too many unforced errors and would also want to improve her service percentage. Her backhand is still poetry in motion, but it wasn't immune from error, while the forehand let her down on numerous ocassions. In the end her experience and proficiency under pressure probably got her over the line.
I'm also not convinced that the slight adjustments in her technique and overall game are having the desired effect. The thing I used to love about her, as well as the mental fortitude and determination, was that she never seemed to play unnecessary shots and could grind her opponent down defensively, whereas now she is always going for the killer blow.
Hopefully she can improve with match practice and play better against Ivanovic. Should be a cracker of a semi-final tomorrow!