Im sorry, I know I will be hated for saying this... But pots have needed to be nerfed for a very long time now. They were never intended to be chain-chugged or there would be a macro built in to the UO client specifically for that. It would not require a third party program. They were meant to be an emergency fix or boost. It would be the easiest macro in the world for them to implement... First box would say "Use Potion" instead os use skill or cast spell. Second box would have a drop down menu to allow you to select what kind of potion to use. Done. But again, this was not the intent.
I will absolutely agree that pets should be addressed in PvP, and I'm positive they are working on that. I think tamers SHOULD be viable in PvP, but not untouchable. However, I am overjoyed to see pots get some of the tough love they have needed for so long.