I tried out the resetting quests thing to get the new prestige points since I don't have the nerve to create custom maps.
As already discussed in the other issue, the reset button placed on a specific level is incredibly misleading. Yes, there's the total count of quests, but the button being placed for a specific level is like 10 times more signalling, so unless you are the developer who conceived the function, you almost definitely assume it will only reset that particular level's quests.
Aaaand there go all my so far achieved quests.
For a laughably low reward in prestige, I might add. I won't invest WEEKS over WEEKS of grinding quests just to get the prestige branch researches.
I didn't know about the cloud saves "lost progress" list until now, but now they are filled with autosaves that are too late, so my progress is just gone.
I won't invest the time to do them all over again, so that's that about doing quests.

But well, I thought at least i'd spend the prestige points I received from the desaster.
So I bought "Quests prizes".
Then I noticed that the two dev levels had stars missing all of a sudden and I lost star research as a consequence.
In an attempt to get them back, I noticed that rumble became incredibly hard, all of a sudden.
Before, I easily got the 100K score star after trying a few times.
Now, even with that knowledge and even with spamming nukes and other skills left and right AND an even better maze layout, I hardly get to 50K score. It seems like there are twice as much enemies and harder enemy types much sooner.
Is that the effect of "Quests difficulty +10%"?
Or what is going on?
(btw, I have all other research done except for a few next to irrelevant teal blueprint points. So levels should be rather easy. And they were until shortly.)

So to summerize:

• The incredibly misleading UI killed all my quests progress.
• The prestige costs are ridiculously high.
• I lost dev level stars for now apparent reason.
• I can't get them back since rumble got something like twice as hard as before.

Bottom line: this moreless kills the game for me unless all that new weirdness gets fixed soon.