I'm not a widely active Twitter user myself, but the downtime did make me realise how large of a following Steem/Steemit has on there. As well as more activity during downtime, it would be great to see more communication in general.
Also, completely agree on the centralisation issue. Everything shouldn't crumble because Steemit Inc's stuff goes down. The more true decentralisation, the better.
Decentralization is good. What pushes Steem/blockchain into having such an incredible technological leap forward is our ability to create platforms that can/will improve how humans communicate with each other. Although, It's still very early days and experimentation with these new systems is compulsory.