I'm still playing X-Com Apocalypse however the main problem I have with Apocalypse is cash ( only $50,000 cash) which is very low at the moment,down to 2 fighters which is not enough to shoot down one UFO type 3 or higher ,also if I get one fighter destroyed its like $100,000 to replace .
I know how to sell gear etc.. but its very tight in the early stages of the game,you need to keep your soldiers healthy and out of medical bay(I rotate my soldiers since I keep a few spare and like to have them all combat trained) .
It's tricky having enough cash for everything else and also trying to improve your technology.
I like the fact that when you go to company builidngs to fight alien intrusions, you have to be careful how much damage you do to the interior of the building,too much damage and the company in question asks for compensation or you even get an attack by them if you refuse to pay,also you can get in big trouble if you do spot checks on company buildings if you think aliens are there and it turns out you are wrong,one way to upset companies lol,oh and your fighters can do accidental damage to civilian/company buildings too when they are fighting UFOs so you got to have decent gear on your fighters ie heavy weapons platform that improves accuracy.