Censorship resistance will always be with Hive, as it is built into the immutability and I suspect that no group of witnesses will ever change it - if they do, Hive has been lost.
On the other hand, the more users the blockchain has, and the more traffic, the more bloated the chain becomes.
This is true, but I suspect there will be more improvements made to this and, more advancements in intertwining chains together so not all information is held on the one.