http://www.swtor.com/community/showthread.php?t=403398
look under legacy, only the risha one is acknowledged, even though the csr told me they knew about corso one as well.
i watched my stats before and after I got the legacy bonus so i know for sure both are bugged. If you look at the stat sheet as Arehonn mentioned, you can easily see that you don't get any bonus to crit. Unfortunately it's harder to tell if you do or do get a bonus to endurance. So maybe because of that, fewer people have reported the corso one,