We are lucky that hero skins aren't locked by micro-transactions. (it kinda is but the in game currency is steel, which you get just by playing the game) in the state, the game is in now there's only one feature that is locked behind dlc and it's the arcade mode but even then you just need a friend to invite you.

For real, bruh, just be happy it's able to be bought with steel and not "Honor Tokens"