It doesn't really matter how good your deck is

Sortash

Its not about removing randomness. Its about to reduce it. Its not about to organize the order in which we draw all cards every game. That really would be awful But it really would help to adjust drawchances for all cards by a certain degree. Adding a card-count (1-4) for each card added to the deck and increasing the amount of card-slots by 2-4 would allow for more diversity and control. You would have to reduce draw-chances on one side in order to increase/enable the usage of more/different cards on the other side.

Like some previous posters stated ... there are those games where you simply dont get any creatures ... considering the fact that you already have 4of10 cards for creature-summoning this is simply dumb und frustrating. I also lost to games where i started with 3 times the same card and never got a chance to use them because it needed a creature-target that never found its way on the board (or was instantly removed).

Some cards dont have much value when beeing played/reinforced repeatedly. Mirrorpool would add its effect only once no matter how many time u cast it before it gets triggered. For some supports its even a a drawback if you reinforce them becausey the need to be destroyed for a benefit. Also special abilities on creatures stay the same no matter how many times you reinforced them. Maybe it would be possible to add stacking effects to those creatures/supports to make repeated casting actually useful.