2MB
The block size is a total non-issue blown out of proportion. https://steemit.com/cryptocurrency/@vimukthi/bitcoin-fees-triple-under-a-week-while-dash-makes-itself-10-times-cheaper-my-discovery-of-a-secret-device-to-store-the-entire
Also there is Dash labs developing specified hardware to improve the experience and avoid possible draw backs in the future. Dash develops the tech instead of holding back their coin.

45% of block reward is split between masternodes. So masternodes will never complain about increasing expenses as they are paid by the network for their commitment. That's how true capitalism work. Incentives instead of force or shaming or other commie tactics.