I get the complaint about healer DPS being quite simple. It is (for White Mages and Conjurers) simply "apply DOTs, throw rocks", and ranges from being between 2 and 4 buttons. The reason it's this simple though is because it's not really designed to be "the thing you should be concentrating on" like it is for DPS classes. What you should be concentrating on is the party list so you know when someone needs healed and can respond accordingly. Healer DPS is simply something to do when no one needs to be healed- it's an alternative to "standing around looking lost." It's mandatory because standing around doing nothing is pointless, but it is only something you should if no one in the party needs you to do something else.