I am concerned about CL being unusable in modern as it's the main reason why I can still win fights. It makes me wonder where things will go as I will have to fork over funds to get the new decks. Maybe I'll just go for a weaker deck and get less rewards. I don't know yet because I don't think Wild is worth it given the pass price.
When the Chaos Legion set comes out of Modern I will try again using a bot and see if it will be worth using a bot or not but from my previous test I think without renting cards I could make a profit.
If the current structure of Wild Format will not change I will either not buy any more cards or I will buy few and I think I will focus on renting cards to play in Modern Format, of course always if it will be convenient for me ;)