Take a look at the official feedback forums, at least ini and Bluemesh are active there and answered such questions. They basically provide the package to MS and they seems to collect these and release them in one go.
Yes, this release seems to be a bit rushed. I’m pretty sure Nemeth already is working on some update. All 3rd parties are asked to work on all aircraft in that pack like it’s a regular payware with regular fixes and regular support from my knowledge.
No. But tbh. as it’s Aeroplane Heaven we talk about here the guy behind that is a bit difficult to handle. He doesn’t seem to be open to feedback, especially when feedback was provided by Xbox users. He basically says on Facebook it’s the fault of MS to forcing this stuff to be pushed there and he was against that - so yeah, we’ll see whatever MS (not Asobo) will do against that.