The only thing EEAH does now is provide operational analog gauges for the Mi-28. You will still be able to fly the Havoc without EEAH, but you will need to rely on the HUD.
You can always wait until EEAH inevitably goes on sale for $3 at GoG, and pick it up then.
XBL: The Mad Gonzo
The average Naval Aviator, despite the sometimes swaggering exterior, is very much capable of such feelings as love, affection, intimacy, and caring.
These feelings just don't involve anyone else.