Just my 2 cents....
After leveling a brute and scrapper both to 50 without too much use of the AE I'm a little burnt out on the slower leveling that comes with running regular missions. At this point I'm more interested in seeing how different AT's and builds play.., the AE farms made this alot easier and enjoyable especially for someone like me who works 8 hours a day, has things to do around the house, and then wants to sit and enjoy a MMO for a bit without having to play for 2-3 days just to gain a level. I still enjoy the content the game has to offer by running TF's, RWZ raids, helping SG mates, etc.., but the way it's looking right now I don't know if I'm up for running any more toons to 50 as it's just too time consuming. The AE(and the time it could save) is one of the many reason I came to CoX over "that other MMO".
What about an optional(can be toggled on or off) XP bonus based on the number of or after a certain number of lvl 50 toons on an account
Or have the AE locked until a toon on that server reaches lvl 50., similar to the way Epic AT's are unlocked
Or even have a minimum level restriction on the AE..,
Just don't completely nerf the AE for those of us who want to enjoy the game in a different way now that we've played through both sides multiple times.