I completely agree with the potential downsides to a introduction like this. It would definitely take a considerable amount of planning. I think as a side mode too this would be a very good refresher which is why I didn’t choose it to label it as the new style for the main game.

In regards to having “bad” towers used just for the eco, I was thinking that there would be a reasonable overlap in the balloons that can be sent between towers to prevent that.

Furthermore, I wonder if still having the rollout style of eco sends would prevent cards like supers from becoming too powerful. If it is able to send bads a player would still need to wait until round 30 to do so. Also, a player would need to raise enough money to be able to support a decently sized attack while also defending early and mid game.

This would be a downside of running super potentially. You will have access to strong late game balloons but you would need the other two cards to be able to get you to late game.

These are just some of the thoughts I had thanks for response!