Way too many cards in the format from having way too many sets in the format. It makes the current standard nothing but a big mess. Standard should go back to being only 4-6 sets.

Immediately remove all the sets from Dominaria United to Outlaws of Thunder Junction from standard

Bloomburrow to Tarkir: Dragonstorm is already five sets which is already enough for standard.

Then for the next block, reduce its size back down to three sets so that you now have more time to actually playtest them to make sure you're not printing a bunch of overpowered counter and token spam cards. Cycle out bloomburrow and duskmourne when the new block begins so that there will be only 3 sets form the current block.

Then standard will fixed simply by doing this and then going back to the old and much better standard format.