I've gotta put my 2 cents in here:
The Mission Planner in my eyes, took care of a problem we had in Warbirds where we all wanted to coordinate an attack, but we ended up with planes that had different fuel loads, different ord load outs, bad communication, delayed start times and basic confusion. It could only really be done at a Event or squad level to be deemed successful. What the Mission planner in AH is make that coordination simpler. To say that one should get more perkies for joining is IMO insane. YOur still doing the same thing you would be doing if you did not join, except someone has been kind enough to pre-load, pre-determine your aircraft/target for you, still leaving you the option whether or not you want to join it.
I have no fewer than 50 pre-made missions. They take about 1 min to edit and load. If you ever want to launch a mission yourself (and you flight knit), contact me online, I will post the mission (with your aircraft type) in a matter of nano-seconds, with your name. The only thing you have to do from there on out is to SAVE the mission so that you have it for YOUR future access.