Amen. Common vanilla-git approaches/workflows like feature-branches/sprint branches/hotfix branches are a massive pain due the often undocumented pedantry of Arcanist/Phabricator.

For example, if you merge a reviewed commit into two different branches and then god forbid you try to merge those two branches, Arcanist will fail with a cryptic message - and you'll only realize that this is arbitrarily/buggy-ly forbidden only when you try this workflow several times...

Vanilla-git or even a Bitbucket/GitHub/GitLab style pull-request style workflow gives you so much flexibility that Arcanist just takes away from you, and the only way to learn these quirks is the hard way....