I contacted ALN about this, and apparently the emanage ultimate has the ability to change the rev-limit but the function doesn't work with the accord euro.
I also asked him about the ECU re-learning and he said he had the ultimate in his car for 7 months with no power drop or driveability issues.
After doing some more research there appears to be a difference in the way you tune the car with the ultimate compared to some of the cheaper piggybacks like the Apexi VAFC. The e-manage doesn't just send a different voltage to the stock ECU. Instead the e-manage reads/intercepts the voltage from the standard ECU and creates its own output voltage which is then sent directly to the injectors.
This would probably explain why the standard ECU doesn't relearn the tune when using the ultimate.
The feedback from ALN is enough to convince me the e-manage ultimate is worthwhile. There's no other mods I can think of that can provide 10-15kw atw for $1500.
I'll let everyone know how it all goes...