I say no one has a right to tell you how to play. I personally hated getting told how to play rdm. With the excuse of... you need to do stuff for end game. I was very good at rdm in the sence of I knew my timing an was quick with dispel. If i needed to rest I rested. If I needed to convert I converted. I played rdm best when I meleed. As thats how I had fun with it.
I mostly played mnk with mnk/thf cuz I like doing crit dmg since i was mithran. but ppl again told me off about it saying go "/war go /war. then go /nin go /nin. You don't play mnk properly if you not stealing hate from the tank" << this is the only thing I hated in ffxi. I just hope in ffxiv Ima be able to play my own style, and that as long as i'm a team player that should matter.