Another thing is that you can't necessarily do things like in AION... give the PUG for example... your combo rotation basically starts out as bootshine, true strike, then snap fist... BUT
once you learn new skills YOU can decide how to vary it by doing either
bootshine - true strike - snap fist
or
bootshine - twin snakes - snap fist

then even further in the game

you add the possibility of changing out snap fist for Demolish or Rockbreaker ... etc...

This makes playing your character more fun in my opinion... IF there was only ONE set to combo with then I can see a desire for an AION style button setup where the next skill replaces the first in the series.