Agreed that it's inconvenient. Rather than separate it I'll cut it down. 2, 4, and 6 all collapse to "client feature sets differ"; this is a meta-feature, not a meta-bug. The downside of client control is that not everybody sees the same thing. The upside of client control is client competition, which has similar benefits to market competition.

Solving adoption is the point of section 2 and is too long to describe here. Note that, as mentioned, I do not actually expect this to be adopted. The world isn't that kind.

3 is a legitimate problem and will be addressed, but it's the sort of thing where I need to spin up INN and see how it actually behaves when presented with edit-style supersedes. If there is a weak point in my "this is possible" argument, this is it.