Its interesting that you bring up the comments of Magic commentators, but you fail to point out that they are all male
There are so many ways to try to combo off with Bolas's Citadel, whether thats various kinds of storm decks in Modern, Jund Citadel in Pioneer, or that deck youve seen in Historic with Bartered Cow and Refurbish
This is especially true when you factor in that Dimir doesnt get mass haste, doublestrike or damage doublers
It fits into a lot of Commander decks, is likely to see some play in Standard, and being as modal as it is, its new and amazing
Log in RULINGS 2019-06-14 If you dont pay the overload cost of a spell, that spell will have a single target
Some examples of creatures that fit these creature types are Serra Ascendant which benefits from the lifegain, or Loran of the Third Path which has a good ETB and draws cards