Draft plan (please edit):
1. ~~release 2.0 release candidate and stop updating shared/nightly releases~~
2. ~~mass change all #pywikiboot-compat bugs to Lowest priority, except if they are also #pywikibot-core tasks, with a note to retest in core~~ and close the task as Declined if the bug is fixed in core.
3. notify all large village pumps that compat is deprecated
4. request that 'Bot approval' processes and teams reject compat bots
5. T99373 - #Analytics monitoring and reporting on compat bots running on Wikimedia sites
6. rewrite / replace compat bots; fix core bugs preventing upgrading to core
7. Move all compat documentation to https://www.mediawiki.org/wiki/Manual:Pywikibot/Compat , add it to https://www.mediawiki.org/wiki/Template:Pywikibot
9. hold a #pywikibot-general cleanup day to triage all bugs in that tag into either/both compat/core, and then delete that tag. (and then repeat step 2)
8. release Pywikibot 2.0
10. at Wikimania July 2015 (https://wikimania2015.wikimedia.org/) , mass close all tasks that are #pywikibot-compat only
11. Block bots using Pywikipedia in user-agent
12. Celebrate.