The worst thing about this simulator right now, apart from the two different versions and all the alpha things, is that you have to be very careful when choosing what modules you buy, because most of them are made by 3rd parties, and their levels of quality are very different, actually very few of them are even finished, even after years of being released, so before you buy, do a research (web, youtube, buyers opinions) of every module you want to not have unpleasant surprises.
I think most of this problems will be solved when 2.5 arrives at last, things will evolve a lot faster and with less trouble.
The possitive thing, this is the best military simulator BY FAR, it has a great present and even a greater future, it evolves slowly, but solid, we will be enjoying it for years to come.