Mosaic getting better and B6 adding Mosaic plus

[mochjas]

https://twitter.com/thepointsguy/status/1471910809882214402

[AJK]

1) New Tier, which requires 3x more spending, but will only last until 12/31/22 even if you hit it in November.
2) Regular mosaics get cheap/free EMS back, which is nice, but the main draw was free cancel/changes/redeposit which everyone/kettles have now.
3) Oh, and how could I forget? all Mosaics will be eligible to receive a complimentary Business First upgrade on the Heathrow Express train between London Heathrow and Paddington Station.

[eliraps]

From DDMS:
"Same day confirmed flight changes (without paying difference in fare) and standby fees are waived for Mosaic members, even on basic economy. That means you can buy a cheaper flight and switch to a more expensive flight for free (even to a nearby co-airport) starting 24 hours before your original flight. Note that basic economy can’t be changed for free before 24 hours prior the flight."

1) So i book the cheaper ticket now and then 24 hours before change the flight? Is there any risk? How likely is it that the flight i actually want may be sold out?

2) Does this apply to flights operated by AA?
If i book LGA-ORD on AA can i change to JFK - ORD on JetBlue?

ETA
3) Can i change a ticket from LGA/JFK/EWR to HPN?

[PlatinumGuy]

So i book the cheaper ticket now and then 24 hours before change the flight? Is there any risk? How likely is it that the flight i actually want may be sold out?

Seems like you're spelling out the risk yourself. Obviously the odds of a flight selling out are going to vary

[eliraps]

3) Can i change a ticket from LGA/JFK/EWR to HPN?

For some reason jetBlue is not showing flights from ORD to HPN even though AA covers that route.
If I could book a flight on B6 (using points) or AA (using dollars) metal from ORD to LGA/JFK/EWR and then switch it to HPN (operated by AA) that would be an amazingly sweet deal