In the formal innovations of fresh system - just fix numerous bugs and glitches that were made by developers earlier. For example, the update should solve the problems with the iPhone SE Bluetooth-accessories that are not too "good friends" with sound profiles.
However, most people are wondering quite another - the system performance. The last test version of iOS 9.3.2 have received significant boost in speed, which is especially noticeable on most new devices are not. The final build must also be tested, so unequivocal opinion on this matter now, just do not.
