I think that the egis follow a different level pattern than the master. I seem to recall that their accuracy cap, etc is far different than our own. Then again, there are some stats that are pretty much useless to the master as well as the egi (i.e. spell speed). So, to answer your question, yes, the egis are gimped at a different rate than we do at level sync. Its a sad fact but true for the SMN job. Although, I could be mistaken and please correct me if I am.