Ya this has started to be a real problem for me as well, I just hit 48 on my 2nd toon an Imp Agent. And when I got my orbital strike I seriously had no place to put it. I started going over the skills I use, and I was using all my buttons for the same reason mentioned above, medpacks relics, huttball, heroic moment and now the legacy skills, and I don't have room to put all my bare hand fightclub buttons
5 would be ok.. 6 or 8 or 10 would be better
Peace.
Xsi