Torqued-Up,
This is one of the faults that I also discovered in an otherwise fine transmitter. The Optic 6 has the dual elevator capability, but you do lose the extra channel and some of the mixes. I have not been a fan of servo reversing Y harnesses having had two failures. On my UCD 60 I used a standard Y harness and reversed one of my HS 635HB servos (very easy to do). The elevator has worked perfectly ever since. There are other ways around this problem, such as using one different brand of servo on one side that rotates in the opposite direction. Unfortunately running separate elevator channels is impossible with the E7.