You're entirely missing the point. I said you that through PVE it should take no more time than it currently does through macros. The point of a 24-hour cooldown on getting XP from killing a single player isn't that you should only get so much XP per day. It's that killing your buddies alt 30 times shouldn't be an efficient way to level.
The average player should go out. Kill zombies in a graveyard for an hour or two, and have a build that's at least group PvP viable. Then they go out roaming with their guild. Kill bosses, get some ganks, maybe run some dungeons and all the little ticks here and there finish up their progression naturally. The PvP kills if they give XP are a bit of bonus XP not something meant to be the sole or even a major driver of your progression.
The only people majorly hurt by the cooldown timer are people who want to grind by killing the same character over and over. Which is the intent. That shouldn't be viable. Hence the timer.
As I said though. This isn't even a central theme. You're attacking the primary system (that leveling should be done via actually doing content vs. action spam) based on a minor side tangent. I don't even think they are at a state to be bothering with such things. Right now it's simpler to use a 100% PVE system, so that's what they should be doing. The idea PvP could give limited XP is only something I talked about because someone else suggested it and I wanted to propose a way that could work without being abused rather than just shooting their idea down.
I think this forum has enough of people shooting ideas down for the hell of it that sometimes, even if I see the flaws, I try to find workarounds to make people's ideas work instead of just using one obstacle as a reason to say they can't.
PVP exp based created other problem with new player that dont have friends feeling a huge dissadvante because they grind it up with there 20 buddies like we all would do.
The player will always search the fastest grinding method and minimal effort to do shit, thats how humans work.
If you create barriers that only 20 people will grind the hell out of each other each day to get your stuff up its simply wrong.
I know what youre idea is and what is it about, but i doesn't change the fact that it can't work.
It will end up in even another barrier to players for no reason.
If you think people will go and farm on the graveyard than your completly wrong.
The guild of 10-20 people will login will kill each other for the exp and than they will play a other game and login the next day again. until thier chars are up.
YOU can't force people into actually doing action because they will hate it.
If you drive people to mechanics that they must do, than they will hate it. YOu must get people to actually wanting to go to the graveyard not forcing them.
Problem solving is better than Symptom solving