i certainly wouldnt be trading a position in SH for a position with QCCA as long as the transfer process is in place.
If you transfer from SH to LH under the terms of the current EBA you will get the pre existing LH conditions. There is also no guarantee that you will be deployed to the A380 either so be very careful.
I can understand why you would want to come to LOng Haul but for existing employees resignation is not a sensible option as you would lose the recongnition of all previous service for redundancy and staff travel among other important things.
Please make sure that you get everything in writing in relation to these matters and dont take anything verbally