Damn I love Truth in PvP. I put Corrective measure down for it. Hell, I even don't mind Bastion and First Light being on next, because I know Truth is going to do some funky stuff there.
I still think it needs a PvE buff, it needs a cluster of some sort to make it deal damage worthy of an Exotic. But other than that, its lock-on is unmatched. Dunno if I am going to upgrade it beyond that though, I really wonder how a fully upgraded Truth is dealing with Level 30 Axis enemies in the Vault.
Pocket Infinity is a great weapon. It shreds anything Solar. The charge is slow, but after that its fireworks. The extended mag was overrated. It burned ammo and I think subsequent hits have a damage penalty. Speed reload is sort of useless though, its reload is already very fast imo.