Dryaan

Hi,
I am in the early stages of planning a RTW trip in 2025, and would ideally like to start booking it some time in May or June of this year (to benefit from the current 10% bonus point transfer).
I've been diligently reading the past fifteen pages of this topic to glean some tips, and have been playing with jaytw's fantastic tools.

One possible itinerary would be:

1. LHR-NBO on BA
2. NBO-DOH-BKK on QR
3. BKK-HKG-MEL on CX
4. SYD-HND on JL
5. HND-DFW
6. DFW-YUL
7. YUL-LHR

Several questions:

1. It seems QR availability is limited to 120 days from now. On the other hand, I feel the (more popular) HND-DFW on JL only has availability close to the limit of the availability window (340-355 days from now). Any advice to concile both in my itinerary?
2. Are phantom availability a common occurence using CX's website?
3. I've heard transatlantic BA fights come with high YQ & YR. Does it happen systematically, even when booking through CX?
4. Finally, any general comment on my route and choice of airlines?