ENY helps keep the sides balanced. If you scrap it what incentive is there for people to switch and balance?
ENY doesnt promote players to switch sides, not with the 6 hour time limit for returning. Many players are also loyal to a team, there is nothing wqrong with that either, why would you want to alienate more players forcing them to fight against their teamates or squadmates?
And if you cant find a fight in p40 you're even less likely to find a fight in a spit16.
You dont fight against spit16s and ponies in a P40, all you do is dodge untill they lose their E and run away. Poor game play at its best. Add in the time involved if you up one field out. By the time you get there they have either run away, or captured the field and moved on to something else.
ENY doesnt work with the low numbers.