-The Nighthawk was rarely used for surprise attacks even with it's stealth ability. It just never really got there on time anywhere, it seems when it would try to transport Infantry, it would never get past the defences. The improved Nighthawk Self-Heals like ALL other aircraft because it cannot be repaired on service depots. Their climb speed has been increased so they move around much faster and their gun get's a tiny firepower increase. The Nighthawk's also get a large armor boost.

-The Harrier throughout YR was never used. In my online experience Harrier was one of the most useless Allied Units. It would always get shot down and never make it back to target and it was just too expensive for it's usefullness. The Harrier will now only target tanks as it is relatively useless vs Infantry and Structures. It does alot more damage vs vehicles than before and it's cost has been decreased down to $1000, it's armor has also been slighlty increased for a better survival rate and also it's missile firing range has been increased dramatically due to upgraded Mavericks. In the end Harrier is just a cheap early game Tank Killer.