I get that flights to Yangon are dead cheap from CNX at the moment (1490 was the price I saw recently) but you're not considering that most who go to Vientiane fly to Udon Thani and bus the difference. Also you can get a VOA for Laos, you need to apply for a Myanmar visa in advance.
Cheapest destination direct without requiring a visa would be Kuala Lumpur. There are cheaper flights to Yangoon but a visa is required to even get on the plane.
They were always planning to - they're building a multi story building on the land they own near the airport. The only question is whether they move all or some of the services into the new building and when.
In theory won't be a problem - been there, done that with slight variation out of CM (language ED to visa exempt to TR to self-defense ED), however, anywhere but Penang in between times at this point of time for a TR given the ongoing reports of drama.
You might be better off in KL if you don't want to go to Vientiane for the TR - you still need to have your paperwork in order but they're not being quite as picky/pedantic. Alts are Vietnam (Hanoi or HCMC) remembering that you can fly direct from CNX. I priced HCMC the other day, <2k one way and it's great place if you haven't been.