It's not the E-manage that sucks, it's your tuning that sucks.
There is a lot of misinformation about the Emanage on the forums. There are two different versions, the Emanage Blue (older) and the Emanage Ultimate (newer). The Blue definitely works on the 7M and it can adjust timing with a cheap, homemade circuit. The Ultimate could work on the 7M using the same settings as the Blue but it taps into 5x more ECU lines than does the Blue so it might be difficult to do as the 7M is not a listed application (that doesn't mean that it will not work though).
Blue:
-16x16 air map based on TPS and RPM
-Injector Duty cycle adjustment
-Add 2 extra injectors
-Connect wideband and log
-Can hook up to the Profec E-01
Here is how easy it is to set up the Blue:
http://www.mohdparts.com/emanage/install/supra_mk3/ignition_emanage2.jpg
Ultimate:
-Same as above
-Allows for removal of the AFM (similar to the Maft-pro speed density)
-Much more precise tuning allowed
If you have the Emanage already go for it. If you really want to eliminate the AFM than you should look into the MAFT-Pro. However, for the money the Emanage Blue is very capable and people have made a lot of power on it. If you are looking to make 500+ hp than you should invest in a standalone.