I know this has been touched on before, but I would also like to add that auto-calculating EPGP item values based on the formula provided by the system would be a HUGE help.
Currently, Im setting up to use GRSS as our loot system plugin, while running EPGP Mod with all options disabled except for "Show item values in tool tips". It still requires you to manually enter each item value into GRSS as it shows up, but its better than nothing.
It would also be nice to implement a bidding system to work with GRSS, similar to the EPGP Lootmaster plugin. Something that would allow all items to be presented to the raiders at the same time, allowing them to bid, pass, offspec, etc etc. This would save massive amounts of time that would otherwise be spent doing loot 1 item at a time.