Depending where melee have to move to, they might lose at least as much DPS during movement..

So if I'm reading correctly..
- THM is the only class without a long term resource.
- While an ACN may eventually run OOM, managing MP is an active part of how to play the class.
- LNC can use Invigorate for TP, and their DPS is sustainable in practice (due to downtime).
- PGL has no innate ways to restore TP. Are they also sustainable in practice with Invigorate? What about without it?
- MRD and GLA have no ways to restore TP. Do they have TP problems? Can they only generate threat in bursts and then are stuck using no TP skills for a while? Are they much awesomer with a BRD feeding them TP?

If a lot of DPS classes use long-term resources, maybe TP isn't so bad (though I'd still like to see Sprint's cost changed). But then I would hope/expect that classes should have similar longevity without requiring other class abilities or others sustaining you.