Like ManuelBravo said, hunt logs in Heavensward were basically just replaced by the Clan Hunt. It makes a lot more sense to have evergreen content to help leveling than a one-time log with a bonus, especially with 50-60 exp totals being what they are.

Achievement points are just achievement points, they currently have no other use as currency or whatever. I don't foresee that changing.

All of the upgrades you mention would require server changes, and thus are most likely unrelated to "PS3 limitations." Who knows what they'll add as the game and its budget grows, but don't get your hopes up for the PS3's removal to allow for much aside from larger areas and such.