Some people has mentioned that going back to Stock MC2 including recovery, then accepting the MK4 update from Sprint, then re-rooting, the flashing your rom of choice fixes a lot of issues.. I was getting many reboots, and freezes with Classic 2.0. Then did what I have mentioned above, re-installed Classic, 2.0 then went up to 3.0 with devels kernel and have not had any issues.. Give it a try. Make sure you use philz 188.8.131.52 recovery as it works best with 4.3 roms..
He has a 4.3 rom in the works on a seperate forum of his own.. 'mI not sure were he is at in the dev.. I know he has been very busy with his new job, and has not done much as of late.. If you wan't I can dropbox a link for his Synergy r105 which is MC2 based.. IMOP I have said this many time.. But MC2 is the most stable platform that came out for this phone.. R105 is my current and do not plan on going back to 4.3 until Sprint come out with it's update to 4.4..
r2- 1. Advanced Power Menu 2. Data Roaming Icon Removed 3. 100% Battery Charged Notification Removed 4. PRL Write Enabled & ##DEBUG# passcode removed 5. Sprint Connection Optimizer hard-disabled 6. Changed Device Status (in Settings>About Phone) back to "Official"* 7. Disable Signature Verification Checks 8. Native Wi-Fi Hotspot enabled :D 9. 1x/3g Icon Fix r1- Base rom