The amount of XP needed for next VR rank is lower than the amount of VP that used to be needed. But I seem to be gaining XP at quite a reduced rate compared to VP. For example, I just cleared a World Boss in VR4 Malabal Tor and got like 2381 XP. I think I used to get like 36000 VP or 42000 VP or something like that for clearing an area on that map. I have always been someone who has to clear everything in a zone before moving on. It is kinda OCD, but that is how I play.
This obsession with completing content has always served me well for leveling, from Level 1 all the way to VR8 (where I am now). I never once had to mindlessly grind mobs in this game. But the VP-to-XP change seems to have made exploration and turning map markers white much less worthwhile and grinding mobs much more worthwhile in Vet Content. Grinders always had Craglorn but us Completionists still had a good option.
Running Vet Dungeons was also a good option. I couldn't find a group to do a Vet Dungeon on PTS so I don't know how XP works in them with 1.5. They give very good VP right now, but I seem to recall that was not the case with XP in Level 1-50. Normal Level 1-50 dungeons used to give measly XP, I think. I hope Vet Dungeons are not now like that.
I am kind of disappointed if the new change makes Vet Content require more grinding.
And I hope this will not continue into the Champion System. If faceroll grinding zombies in Coldharbour will give you a Champion Point way faster than doing a group dungeon, that would stink.