It takes far less time than anything else you would have to load in and are over in a matter of minutes and then its on to the next event. Even if you don't unlock a heroic you get tokens and thats tru even if you don't beat the regular Pe. Vendors then give you higher gear that cap at 265, while also getting loot from the PE and drops from the enemies you fight. If you unlock heroic then its a certainty youre getting 2 pieces of gear plus tokens. The modifier I was talking about is an item (you get it for beating the campaign and lasts for 4 hours). I went from level 20 180 light to 260 in a matter of an hour and a half-two hours.
Also titan is incredibly easy this week, like way easier than EDZ. Super small, and both events are like guaranteed heroics which you can do by yourself.
Are you talking about the Medallions from Eververse? The benefit of the Medallion on loot cant be quantified. But the benefit to xp is 625... so if the loot bonus is anything like the xp bonus.. it's not worth much. And it doesn't stack.
Spider boss is not an easy one to unlock and beat solo. Not for the average player. It's two Walkers and a ton of mobs. Witches isn't easy to unlock and do solo either as you have to stand on two different symbols, kill the witches and destroy the crystals while mobs are everywhere.
I mean maybe if you're the type of player who solo's NF's and Raid sections or something but that's not the average player.
Vendor's do give steady loot but PE's aren't the only way to get the tokens. You can run around and do Adventures, Lost Sectors, Gold chests, regular chests, and grab mats. Strikes award loot consistently, Crucible has drops and tokens, Challenges everywhere offer tokens... and dismantling Blues or higher gives parts that can turn in to Banshee.
PE's were the most efficient way to do it in week 1 since the bulk of the playerbase was leveling out in the world. Not so much now.