Granted I really do enjoy the laid back feeling of assassination. I like that to be a good assassination rogue there are things that I need know and to pay attention rather than mindlessly smashing a keyboard as fast as I can. The whole energy system is really well designed so that it has it's limitations but you can play within them building an energy pool to let loose in a burst or just keep up a normal rotation. It also allows for you to not having to fill every gcd since as long as you aren't energy capped and aren't wasting cp you're doing it right.
I just don't understand why anyone would say that assassination needs a buff anywhere. It's such a strong class right now. Hell I don't know why I don't see more rogues out there. When I hop into an LFR 90% of the time I'm the only rogue in the group. Maybe cause locks are still flavor of the expansion?