To ensure some sort of centralisation never happen, the best way is still to spread the hashrate concentration to multiple new pools. I guess since there is more and more people coming into the game, and a lot more will come I think because of the price rise, actions will never have to be taken.
I've thought so too. The more Bitcoin rises in price, and popularity, the more people it will attract, expanding the whole mining ecosystem and decentralizing Bitcoin even further.
As long as new pools come into the game, and could help spread the hashrate, then we could rest assured that BTC will be even safer than ever by preventing a 51% attack.
Nevertheless, I think that in order to encourage any average Joe to start mining Bitcoin, ASIC manufacturers would have to come up with a solution that will have ease mining setup, and most of all energy efficient to help restore mining at home. That would definitely spread the hashrate even further. Just my thoughts.
