Your second argument about running FP/OPS "again and again"
Once you've conquered HM LI, the reasons to run it again and again include:
1. You want the Black Hole comms
2. You like the challenge.
3. You're bringing friends and/or guildies through it
There are probably some others I'm overlooking. But you're not running for the gear that drops in the instance as you already got it.
Heck, I still run T1 HM FPs, but it certainly isn't for the Columi tokens ...
Now as far as adding rewards to HM LI to encourage people to run it, I liked the idea of special gear (such as Cartel market gear) or something similar. Something cool, or rare. Not progression gear, but other stuff. THAT would be the bomb.
How about a White +41 Power Crystal with a 1% drop rate?
What do you think of that?