In reply to Juanma Aranda.

I don't think it's possible to put too much effort into this. Despite really disliking the UX so far it's got heaps of potential.

If it gets things right it could be the first editor to marry the best of both worlds (with one world being a world class editor in which to write pure text and the other world being a page composition tool (currently occupied by page builders, of which none get it perfectly right).

And under the hood, if the block API is done with forethought, it could form a foundation for writing components beyond the post editor (widgets etc).