Dimir could use more of an identity in the formatone that isnt so easily swallowed up by Esper, Sultai, or Grixis decks
you want a Voltron deck that one-shots people backed up by countermagic
Casting a spell for zero mana
But when it comes to interacting with the other mice, it honestly feels lacking, especially for a type that is iconically synergistic, with so many cards designed to interact with each other and dependent on teamwork
Believe me, I get that some of them are pricey, but you dont even have to play the expensive ones: Evolving Wilds and Terramorphic Expanse are just as good as Polluted Delta for a Landfall decks purpose
Consult the Star Charts helps us dig through space, instead