Blizzard's Scott Mercer preempted the patch notes yesterday, announcing that Overwatch's newest tank won't be available for competitive play with today's patch. Player unfamiliarity in late testing was apparently to blame. The dutiful robot centaur tank will still be available in non-ranked versions of the game, however:

When patch 1.9 releases tomorrow, Orisa will not initially be available for Competitive Play. We want to give players some time to learn about and play Orisa before she's placed into the crucible of Competitive Play.

She'll still be immediately available in Quick Play, the Arcade (including custom games with the competitive ruleset), and Play vs. AI.

In other dev news, Jeff Kaplan chimed into an older thread to say that a Map Editor is still on the drawing board, but it's no lean feat:

We are extremely open-minded about releasing a map editor for Overwatch someday. But because Overwatch was made with a brand new engine, this is not a small task or one which can happen any time soon. We have this on our long-term road map and believe heavily in user-made content. But there are many challenges ahead of us and it will be a very long road before our editor can be made available to the public.