In terms of personal ROI, only #1 and #2 are relevant.
Nope. I think #4 is the most important, but that's only true long term. The ability to rent out RCs for cash is why I invest in hive.
Right now RCs are abundant, but my bet is that more dapps and more users will use hive. So staking is okay, it doesn't need extra rewards, but I agree with the rest of the post.
The experiment of the social layer definitely failed. We need fragmented communities with their own reward systems, otherwise it's constant disagreement.