I've been hunting and pecking away at it for about 4 hours now, and I'm only at 90 Event Stones (or, Snot stones, as some call them).
I need another 28 Arcane Blood- that's not projected to be available for Glory Purchase until the 22nd May, and that's what I need for Tesla and the Titan class- so I have to suffer through the event.
If they limit it to PvP, some people never willingly exit PvP, so then they will continue to earn PvP trophies as they can with a side benefit of (x, y, and z).
If they limit it to Explore or Challenge, then people will never Explore.
I'm pretty much end game at this point- level 943 at current PC/Console, level 1050'ish or so PS4- but I started playing the PC version about 4 months ago and I wasn't in a kick-derriere guild like I am now, so I don't have the surplus gems and keys before it was 'fixed' with the Guild statues.
Personally, I pretty much refuse to do another Treasure Map after having to do them for two events already. My PS4 account has had "Do 5 Treasure Maps" for the last 4 days.
I think what we have here is frustration at the hoops that have to be jumped through with these events, to wit:
a) Beginning players going to a land where Poison is prevalent, and having to do 100 - 150 explores in a week to complete the event? Not fun.
b) Mid- to late-game players having to spend time away from PvP to do the same 100 - 150 explores to complete the event? Pass.
Here's a thought (and I'm going to summon @Saltypatra just for the sake of it)...
Have the Developers form a "Player Community Forum"- about 5 to 10 players, beginning to late-game, where they can bounce ideas off of about what each of them would like for the Event system. Get them to sign NDAs so that this stuff isn't discussed outside of the email chain or what-have-you until it reaches the system. Find out what would be too (bleeping) annoying (hunting elves, or even worse, Naga; having to get 600 event gems through the Treasure Map System, etc), vs. what is too simple (150 Dragons in PvP) to strike a balance between. Maybe make their "handles" publically known, or in each event, post a link to a static webpage with the original Dev thought was, what the players thought, and the resulting event so we see the changes that were made.
You're not going to have an across-the-board consensus, of course. But, you may avoid dozens of future thread generation about the events that the Devs have incorporated into the game.