Remember, don't hate congratulate!! Not everyone's cube is the same. What passes as uninteresting for you might as well be exciting for someone else!
Although I would generally agree with this statement, this set as a whole just doesn’t have as much for as many people as most of the previous sets.
You’re always going to have a card or 2 from a given set that someone is going to want to try or play. For example, Pete seemed interested in that Reef Elemental guy. That’s not necessarily a card most people would run, but if it works for him, than it’s great! After all, it can be very hard to find the best version of an oddball or niche effect, sometimes the options just aren’t always there.
This set’s issue, however, is that the vast majority of the cards that have been previewed are simply just not things very many people are going to want to add to their cube. Pretty much every set of the last 2 or so years has had a good chunk of cubeable cards. Many Riptiders had a good 15-20 options they were considering for their cubes out of GRN and RNA, and the card considerations weren’t even necessarily the same!! Even the last core set had a good chunk of solid playables, some of which are even becoming cube staples.
This set just isn’t like that. Many of the designs are bad/narrow outside constructed/ or unplayable. The few semi-interesting options are either stat monsters or fighting for space in tight slots. Chandra’s Regulator is an interesting card, but it’s not worth re-building a solid red section to fit 97% of the time.
The unplayable or uninteresting nature of the cards in this set is not it’s sin, however. Many sets don’t end up with a lot of cubeable pieces because they were pushing into new design space that was narrow. For example, Rivals of Ixalan really wasn’t a great set for cubes, but it did introduce interesting things into other formats in new design space. M20 isn’t doing this. Instead of being a “bread and butter” type set like M19 or Ixalan, M20 is full of a bunch of random stuff that doesn’t even seem to serve a real purpose within the context of the set itself.
So yeah, this is a bad set for cubes. I’m sad about it, but I’m not sorry for saying it.