Cap the boosts if that is what is causing the 120 second wait. To me, getting the boosts was the bonus. Having the ability to grind 100s of incubators a day if I wanted within the 2 to 3 hours of free.time I had was why I could help my alliance to hit tier 5 defense.
Now it takes 8 to 12 hours to do 100s of incubators. So its incentivising those who have no life but to battle.
The old system is better in that everyone has around the same amount of boosts if they buy every single.one from the store and do DBIs.
This one favours those who have the hours to sit in 1 stop and do non stop battles. This will unbalance the arena faster than the previous 1.10 meta.
Also an unintended side effect is less players wanting to enter Nublar Shores since Gyro Depot is 30s timer and gives about the same boost rewards. So the new change punishes success and encourages dropping to farm boosts.