Who said you can't apply the theme elsewhere? There's no actual potential framework or SystemUI changes that could potentially at all affect themability, I moved to using the stock framework-res, just optimised in terms of images and with the replacement of the default wallpapers.
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---------- Post added at 09:55 PM ---------- Previous post was at 09:50 PM ----------
Not a single ROM on the OP2 should score as low as 69K, you probably throttled a lot during your tests, this may sound ridiculous but try making sure your phone is 100% cool before beginning to bench and bench the device after a clean boot in a freezer (crazy, I know), if you want a fair comparison, truth is you should find not so large difference, it'll very likely be pretty negligible (+- 0.5-2%).
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---------- Post added at 10:18 PM ---------- Previous post was at 09:55 PM ----------
Memento on battery life, worth the read:
http://xdaforums.com/oneplus-2/development/rom-oxyslim-t3278169/post64515339#post64515339
It should basically be the same no matter whether you use a custom ROM or stock OOS, pretty much all of battery drained almost entirely depends on user config (kernel, wakelocks, apps) and users' actions.
Just randomly popped into this section of the for fun, hope I could somehow have helped.
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