The toll for losing cards is indeed heavy. I only have one max CL set to play and burned all my CL soulbound Cards so when I play survival to test the waters, lost a Wave Brood in my 3rd match. I think I will only play survival before EOS so even when the cards goes to cooldown, they will get reset when new season starts.
I did the same...
This is what I am doing now. I am high enough in Modern to stay there. Now for some fun.
Are you sure it resets in the new season?
It is based on what I read through discord and none of the team have say its wrong.