This SQ is the pinnacle of SQ design IMHO
I understand this is just my opinion and most of you will disagree, but please let me tell you why I appreciate this SQ and I hope the devs hear this positive feedback.
Why I think this SQ is so good? Each difficulty has good reward even for lategame players. Those cav shards are super useful and pretty much everyone wants them. And low tier accs use them to buy GMCs, that award mostly 3*s, so it isn't like Kabam gives godly rewards to earlygame accounts. I'd call it generous, but balanced.
That allows me to take my lower rarity champs out for a spin and earn some meaningful rewards with them, which actually feels great. And if I don't wanna do it? I can autofight the quest in matter of minutes.
For me the main selling point really is that I can play around with my low 5*s and get such a nice reward. It is a nice relax. You go in, 12 fights, open a cav and it is over. In and out, 10 minutes adventure.
I know this isn't objective and that I post just my opinion. But I believe it is important to leave a positive feedback when I like something, even when it is just one subjective feeling against pretty much everyone.