As for Publii, yes it really does appear to be everything I was thinking of making. Except it's Electron and I was thinking native - which users wouldn't notice likely.
Really interesting to hear that people want to post from mobile. I must be in a developers' bubble - i assumed this kind of thing would be done from a desktop! You've really got me thinking there. I guess you could totally do it from mobile. But then you have to fight the app store's distribution/marketing model. Which isn't appealing - at some point you have to ask yourself 'would I just make an easier living as an electrician than do this?'.
Again, interesting to hear your shortcomings with Publii. I think the killer feature would be doing it all from mobile. Which is fine I guess, but then how do you get your data to desktop, backups, etc etc. Lots to consider!
Thanks again for the food for thought :)