I disagree. Vandalising is easier than cleaning up vandalism,
This is a false assumption.
Major vandalism is as simple as writing a vandalbot in pywikipedia, which, if you know python, is a 5 minute job. Fixing that vandalism requires reverting each of those edits, which may be spread between multiple accounts.
Fixing subtle vandalism is even harder, because you have to find it first.
Well, I don't know about other proposals, but mine doesn't. Quite to the contrary, I am proposing to have several levels of blocking. The first is that which is currently called "de-adminning".
I've already explained why desysopping won't work for your proposal.