I think you forgot the actual reason grouping doesn't work so well in TOR.
The only game to ever release with less group content, and less reasons to group, has been Solitaire.
looks at all the group quests on every planet, ability to share conversations, not to mention flashpoints...
huh? I guess its not group content then?
I COULD bring up other MMO's that have no leveling content other then dungeons that you actually need to group for, but... they are not subject to same rules apparently >_>