I see. I better research more on the Bravia Engine if its just a placebo. As I know it only works on photos and videos when displayed on the phone screen. To be honest I never use stock gallery, I use QuickPic which is 10000% better than it, and for the video player I use MX Video.
In any case, I already left CM7.2 due to the battery drain. Tried JJHybrid ROM to give a chance to ICS again, but I really am allergic to the lag and overall slowness must be the hardware really being stressed by ICS.
Went back to Arconium 8.2 now and intend to stick with this (until a new ICS comes along again). Going thru all these ROMs make me appreciate the speed, response, and management of Gingerbread.
As far as experience is concerned, Arconium 8.2 is as speedy, fast, and overall like CM7.2 but without the battery drain and still has the Sony Ericsson experience (ie. launcher, icons). You have to try it, if you haven't.
32GB LT15i on Arconium 8.2 | DoomKernel v22 | V6 Supercharger U9RC11
ST25i on rooted & supercharged 6.0.B.3.184
GT-P7510 on XWLPC | A1395 on iOS 5.0.1