Default [Q] Bugs Xperia Honami. Solved?

(Google translated from Russian)
Are there solutions to these gaps? Hard to part with this nice interface from Sony! I hope to help not indifferent to this firmware!
Touchscreen is buggy:
- This is most evident when scrolling horizontally and vertically.
- You can work, but very uncomfortable!
RAM has decreased from 768 to 578.
Charge level does not rise above 89%.
Of minor problems:
Beautiful clock sony does not show the weather, but on the lock screen to work properly.