IMPLEMENTED: Single Page template design isn't showing when editing a page

Hey @Matej - in case you were not across both, I have a current bug report open about this as implemented in 1.12 and 1.12.1:

Seemingly it is on the team’s radar. I’d love to begin using 1.12.x for obvious reasons, but the template display throwing out the editor experience is now much less usable than the prior version that doesn’t show the templates at all.

If it’s not likely to be resolvable soon, is there a way I can update to 1.12.x and disable this feature until the bug is ironed out? I mostly want to begin using components.

Cheers,
Tom