Retargeting difficulty every block will not make any improvement during really big hash rate oscillations because required work (difficulty) for next block is based on previous difficulty for x number of previous blocks. We need more stable network and everything will be fine.
Regarding performance I really don't know. My wallet is taking about 870MB of RAM.
The value of Qubitcoin didn't change much as Bitcoin value was going up. I think coin swap would give us more problems then benefit.
I will try to arrange another pool since you are taking yours down.
Have you created a pool for Q2C? I'm about to close the pool Q2C and I can write at cryptohub or even email directly to miners to make them switch to your pool. tell when you will be ready