An update to that Crusty. On most multi-mob pulls, DPS should kill the non elites first, then silver, then gold. Some random droid with a blaster will go down fast, and it removes X% of damage from the tank. Rarely will DPS be attacking only my target because I'm cycling through them building threat and moving around.
The biggest problem I am seeing in SW:TOR is people playing like they are questing, Death from Above as an opener for example. I saw this in Warhammer and Rift when I tanked in those games and it took a while for people to get used to their class role. WoW, where I have been tanking for 7 years really doesn't require any tank skills any more due to threat modifications they added to allow anyone to tank to reduce RDF wait times. Tanking in SW:TOR is refreshing and challenging, and takes me back to my 3 stacks of sunder days.
SW:TOR doesn't need a threat meter. Threat is easy to maintain when done correctly. If the group is not behaving, a threat meter won't solve that. The time to recover from a wipe is longer than it takes to mark mobs and communicate with your group what needs to be done. It's a social game, be social and things go smooth.
It does need a combat log though, always nice to go back and see what causes a wipe.