I think survival is a great concept, and can have positive impacts on the ecosystem. But I have two major concerns:

1. It will allow bots. We all know this just invites exploits. How much match volume will be 1 bcx teams, meaningless rating inflation, and extraction?

2. How time consuming it will be. First of all, a whale with a good survival deck will have so much cards to work through that playing this personally might not be feasible. Scholaring is ok I guess, but I wish this wasn't so incentived. Don't know what would fix this though. Additionally, wait times might be overly long in the latter parts of a season, again promoting botting - a bot doesn't care if it waits twenty minutes for a match.

I hope that the team has taken sufficient measures to make this a success!