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: #pywikibot-compat-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.