A few of those aren't system issues, they're data release policy.
Anyway, I'd like four things fixed in terms of system issues:
- Quick and reliable posting of miles/segments flown. I should be able to see credit for the current segment on in flight wifi before I land.
- Not having to split PNRs to standby for upgrades.
- Being able to standby for an upgrade inside T-24.
- Reliable online checkin for international flights.