Modern aircraft are essentially all NVE compatible, but retrofitting is possible. You just have to figure out if it is worth it in terms of losing the aircraft to servicing for an extended time.
FF, we are essentially at a good start point for many of the items I mentioned, and there is a lot of work going on in developing new syllabi and courses to beef up previous experiences and old courses. From the Artillery pov, it hasn't been done for a while, but in the future, the heli won't need an arty observer to call corrections for 105s etc because the pilot will be capable of doing it.
For survival trg, any major mountain range could be used because it is essentially a hound and hares effort without use of ammunition or pyros - therefore, the troops are no more than hillwalkers. The slieveblooms or galtees would be ideal.
Other areas to look at would be to have at least on pilot in the heli side fully up to speed with AH tactics so if necessary, he could advise ground commanders on their employment. This could involve sending him to the USMC or Army Air Corps in the UK to undergo an AH conversion cse. By the same arguement, at least one fixed wing pilot should go on a fighter / bomber tactics course with the RAF.
The other major training developments would depend on equipment replacement, which has already been gone into in other threads.