No. The battery life of the EZ Omega comes down to two major things: one the PSRAM constantly draws power to run (no idea how much NOR mode can change this) and two there's an FPGA constantly running to monitor for save changes to write to the microSD. The former, that's a hardware thing. The latter, that's locked up in the firmware which is closed source: it's the newomega_top.bin binary blob.
I've no idea how more efficient the EZ Omega can reasonably be made. However, it's unlikely that anyone but EZ Flash Team can really make improvements there. As totally a guess, I just don't think there's much improvement that can be reached. I would say, unless you hear a specifically announcement that's supposed to improve battery life, don't expect anything.
