I just finished a Davinci child theme on a test site, with heavily modified header, front page, footer and extra widgets in the side bar. It's not recognisable as Davinci anymore and it's extra functionality now approaches what I have with WOO. Almost. The only things missing are a "Social Share for Discount" plugin which I will miss, but I'm looking for a compatible alternative to encourage Social Shares and the other thing is no compatible "Wishlist" plugin ... which isn't the end of the world.
Which are the most difficult parts of editing for you? And, are you doing core code editing (php, css) most of the time?