Info about my Phone:
HTC 7 Trophy
OS version: 7.10.8107.79
Firmware revision number: 2250.21.51201.162
Bootloader version: 5.12.2250.1(134400)
Can i do downgrade? Or i have to wait?
I think you can simply apply the SLSPL, though you may face incomplete or corrupted ROM update.
After that you may instantly flash the 1.XX.XXXX.X ROM on your phone without problem. (depends on your carrier)
SLSPL here just act as a meta process for flashing back to 1.XX.XXXX.X ROM.