I've only done occulus a few times and that was with guildies so no problems with people not knowing what to do (other than myself), I wouldn't drop out if I got occulus as a random, but I can't say it's the one I'd pick for myself. Basically becuse vehicle combat bugs me, it messes up my interface (I have it working passably now, but not as smoothly as just playing my character) and it's not exactly demanding with the number of abilities you get, even classes which have only a couple of dps buttons to press have cooldowns or watching threat etc to make things slightly more interesting. I also find the movement rather clunky, land based vehicles don't turn very well and with air based ones I find it hard sometimes to judge my altitude compared to the rest of the group/what I'm fighting.
I think the addition of vehicles wasn't all bad, but for me the fights get old really quick, and doing the fight on any of my alts will play exactly the same as doing it on my main.