I believe they should change some flashpoints so people can't just skip all the trash all the way to the end boss.
Taral V is a joke I find, people skip nearly everything and if you pull then some idiots start screaming in chat about it. All BW need to do is put some adds on the speeder routes so people will play the things properly.
I suspect the way to do that is make bonus missions actually count - nobody cares about legacy experience once they reach 50, and many don't care about the piddling amount of experience you get before 50. Maybe you only get half the comms if you don't do the bonuses, or maybe you get extra comms if you do.
(We've wandered a bit off-topic here, so apologies to the op!)