The problem it seems with the recycling of the never-ending quests, is for those players who will get RNG-screwed and end up with a disproportionate series of near-constant;
- Scout X province/s OR upgrade 2 buildings to Lv16+
- Complete 1-2 provinces
- Gain X vision vapors
Too many of those, and you'll have players who;
- can't really even play the event.
(ie: 3-4 VV quests in short order could possibly take over a week to complete depending on how crappy the crafting selection is and/or the player's availability of CC's... not to mention, Ch1 - early Ch2 players will be outright *****-slapped right out of the event altogether due to the lack of even having the MA yet and/or having nothing to really fuel the crafting aspect of the game!!)
- end up massively over-scouted.
(ie: if a player gets unlucky and is forced to burn through 20+ provinces in one event, it can easily leave them with hyper-inflated scouting costs & times for the next event)
- too many Lv16+ upgrade quests can ruin things for end of tech tree players, as it can take them 1+ weeks to get enough buildings leveled up for just 1 or 2 quests.
-etc, etc...
Yes, right now I think there are several downsides to it. I haven't had too many unbearable quests, but I have had several like 9 hour boosted in a row, the 5 minute workshop in a row (I like variety).
I do believe that with the way this works that the event currency needs to be scaled toward the difficulty of the quest - if you get a produce 4 3 hour boosted it should be worth 1/3rd to 1/2 of what the produce 4 9 hour boosted quest is just given the relative time it takes to complete the quests.
The scouting quest at least usually is paired with an OR upgrade buildings quest.
This is what I had last night:
Produce Wooden Chest x3
Produce Wooden chest x4
produce simple toolsx7
collect 400 spell fragments
20KP to an AW
solve 5 encounters or 25 tourney encounters
produce basket of groceries 5 times
produce advanced tools 8 times
So not too bad although there is a part of me that would like to see the 20 KP to AW have an OR if I am on mobile and my AW is full.... it's a pain
I am also going to reiterate that this also highlights one of the reasons I am for scaling quests based on chapter level. Lower level players are going to be hard pressed at times to meet a multitude of encounter quests. I know my lower level cities have yet to recover from the Summer solstice with the huge number of 104/520 encounters to be completed through the quest line.
Scaling or the ability to decline a certain quest.
Yes, I understand that in many ways events and tourneys are more geared for higher chapter players since they need more to do given that they have a higher rate of being research blocked, that doesn't mean that these should be unmanageable for lower chapter players. And as you have said, even for high chapter players - certain quests can be roadblocks.