1 sec blocks are bit too fast, if we have a slow machine or slow internet connect, it will have problems to sync with the network. Why we use so fast blocktime? To be used in the real life transactions?
committee members can vote to change the block times without the need of a hard fork. XTR holders can vote for committee members. the 1 second block is the minimum so we start at the minimum. after distribution, everyone can decide what the block interval will be. but at least now we know 1 second blocks can be done.