Did you ever get those deets on what exactly the vbulletin update would entail? The site's mobile functionality seems fine.
We don't have tagging but we implemented notifications for when your posts are quoted, which is close. You have to enable it though.
Never noticed the whitespace, we can look into that.
The censorship is an advameg requirement for our
SEO, can't undo that one unfortunately. If we requested this, they'd probably end up implementing a way to block our current workarounds

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We're only gonna implement things that are fixing problems or are widely considered as useful. Minor aesthetic adjustments won't undo the declining significance of forums that is causing membership to dwindle. I think improving forum culture would be the best protection against that. That said, SGR's GIF request is a good one. I'm thinking about reaching out to Yac about increasing the PM limit for established members as well. Don't let me keep you from congratulating your hypothetical initiative as a mod though.