Hi, got the same device, but haven't found any roms yet.. What you can do to make it a little bit quicker is to root it and remove all the zte bloatware and the stock launcher (i replaced it with Nova Launcher), install Chainfire 3D drivers, and tweak the kernel (kernel tuner or similar, you can set the second cpu-core to always on, change the cpu governors and tweak memory, uses more power but some of the tweaks are worth it!) check this http://forum.xda-developers.com/show...php?p=44035437
thread on how to root it. Sadly the only way is using a Chinese software, but its pretty easy. When your rooted u can use a program like Titanium Backup to remove the bloatware..
I could barely use the phone with the standard setup, it was sooo slow! But with all the tweaks it almost twice as fast.