Just a guess, but part of the reason is planning any kind of game with a level of mil-sim depth to it, can drive a man to tears and then on to insanity. Its a major hassle, and it burns game admins out.
Kudos to Poncho and company for getting the ball rolling, and to other organizers like EAR and MAA and Wolfpack for running their big games as well. (apologies to those teams I've missed, just going off the top of my head).
And Poncho, I too am waiting for CT 3
It doesn't seem much, to stir a man's soul. Just a moth eaten rag on a worm eaten pole. But 'tis the deeds that were done 'neath this moth eaten rag, when the pole was a staff, and the rag was a flag.
CUM CATAPULTAE PROSCRIPTAE ERUNT TUM SOLI PROSCRIPT CATAPULTAS HABEBUNT