[Q] Games[Android] support confusion - Sony Xperia P, U, Sola, Go

I own an Xperia sola ICS stock ROM [.54] not rooted and locked bootloader. It has 512 mb of ram and
380mb of RAM is available to me. It has a NovaThor 1 GHz Dual core processor and Mali 400MP
GPU. I've played several games on my android but cannot figure out why many games doesn't runs smooth on it.
And some gives bad graphics as it is a low end device for them.. But i cannot understand how??
I've Played NFS MOSTWANTED 2012 and Asphalt 7 on my phone but NFS MW has a better graphic display than Asphalt 7. I searched through
XDA i found that the originally made Hi end graphics are for devices like Xperia Z,ZL but when NFS is showing me the best Hi end graphics without a lag why can't Asphalt do the same.
I'd played DEAD TRIGGER on my phone which have highly Immersive graphics. Totally polished and somewhat they can be compared to PC games graphics. The game runs without any LAG on my
phone but MC3, MC4 lags like hell even when they shares a bit less immersive graphics than DEAD TRIGGER. And Brothers In Arms,It shows a white background and then force closes by it self on touching the screen.
I'd played Max Payne on my phone worked like heaven no lag no glitches but Battlefield Badcompany 2 lags on stge 3 and never works after stage 14.
I've played RPG games like Arlon, Ravensword both worked fluently but I m unable to play Miami Vindication it force closes on touching the screen
IRON MAN 3 worked for me with a bit and ignorable lag but Dark Knight Rises lagged like hell and THE AMAZING SPIDER-MAN throws to home screen after loading the first stage.
Frontline Commando works great but D-DAY lags and takes 5-7 mins to load.
Conclusion is why the games that i've compared with have comparitively lower graphics than the games that run on my device lags and doesn't work or are incompatible.
You must have Observed that GAMELOFT games rarely seems to be working on Xperia sola. But why.
EA games are all working like heaven
Mostly all the other developers work great
But why GAMELOFT games do not work..
ROOTING my device is one solution but this gives a reason for that developer to ignore dealing with the game betterment.