Replaced Titleist 755 w/ Mizuno MP-53, thoughts?

I just replaced my +1/2" Titleist 755 with mid size grips, with Mizuno MP-53 standard length / grip.  Only my third set since 1996 (DCI 962, 755, now MP-53).

Curiously just hit them all OK, takes some breaking in but I did have some observations. Much lower ball flight 3-5i and more right to left. 6-pw seemed fine and worked better left to right. Probably will still add 1/2" and get mid grips. Thoughts from anyone on iron changes? Especially the lower flight 3 iron, that bugs me a bit.

A quick look at the specs on MP53 and 755 suggests the MP53 3i has 21* loft while the 755 is 22* but this is pretty close.  You didn't mention anything about shafts in either set, could this be the culprit?  I'm not sure if 1/2" shorter would change the flight that much or not.  Shaft characteristics strike me as the most likely culprit.

Good point, the 755 had the Tri Spec and Mizuno's have S300.  As I recall the Tri Spec was suppose to be high launching with some mid bend, maybe that with the lower loft is the culprit.  Almost feels like I'm hitting  1 or 2 iron.  Even a flush hit just doesnt launch high enough.

Probably just need more time to get used to it, maybe trying too hard for the first trip to the range.  The good news is the 6-pw feel real good, just a bit more workability, and oddly enough seem more forgiving.  I'm really taking a a chance on these, first non-Titleist irons in 18 yrs.  I just felt a slight change would energize me working on my shot making this year.  The plan was for the AP1 714 until I found these new for about $300 cheaper.....

Actually I meant AP2's......