I trialled Zero/Xero a few years ago before moving from QBD to QBO but I can't say I found it to be any more 'complete' than QBO or any of the other 'mass market' cloud offerings.  They're all after the same market and, unfortunately, that is NOT the QBD Power User (such as yourself). Not to put too fine a point on it, there is far more money in selling monthly subscriptions of a just-good-enough product to half-a-million butchers/bakers/candlestickmakers than there is in selling an all-singing-all-dancing product to a few thousand more complex businesses.

Luckily, I was able to dumb everything down sufficiently that QBO just about covers everything I now ask it to do (anything complex, I do outside of QBO & import the gist of what's been done).