Upgrade from 2.0. to 2.2

Hello, we have a centos 6 server running dovecot 2.0 provided with the OS, currently 2.0.9. We would like to upgrade to the 2.2.19 package provided by the mailserver.guru repo. I read the upgrading docs for 2.1 and 2.2 and found the following issues:

2.0 - 2.1:

• define namespace inbox or delete 15-mailboxes.conf (we do not "care about special use mailboxes")
• plugins and UTF-8: we do not use one of the listed plugins
• to allow mixed usernames set auth_username_format to "nothing"
• solr backend: not used in our setup
• expire plugin: not used
• dsync: not used 2.1 - 2.2
• fts-solr: not used (?)
• autocreate: not used
• other changes: trivial or not used

Are there other things that we need to observe? Is a direct update from 2.0.9 to 2.2.19 feasible with the above precautions or do we need to put in a 2.1 version in between?

Thank you for hints, Jakob