Complicated in the fact that it can't do ANYTHING until you give it information. In flight, why can't it be like most every other airplane? You want cruise power, pull the levers back and let the FADEC do the rest. You want more power, push them up and let the FADEC do the rest.
Also, a go around is a total cluster with that thing. Push the levers up, make sure the PNF pushes the right buttons. If the detent is weak and you accidently go past it on the TO run, oh well. We'll have to wait until climbing to do anything about it. How many times in an XR have you hit the climb button TWICE only not to see the "E Climb" icon on the EICAS?
If you have ever flown a plane with a real FADEC, you will know what I am talking about.
Yeah, the ERJ has a few neat bells and whistles, but the FADEC light isn't exactly one of them. It's overly complicated and takes too much managment to be called that.