There are a lot of questions floating around on Reddit and on the official dev keybase channel about K-size recommendations and plotting software recommendations based on the advent of faster plotting software. A lot of these questions are directed to the development team directly. Questions like if they are recommending 3rd party software are a bit ridiculous. Why would they do that? Why would they spend engineering resources vetting it when their plotter is functional and reliable and can be run in parallel to almost the same level of performance.
I am not recommending that people avoid that software. I am not recommending that people either increase their K size or keep it the same. What I am recommending is to stop asking the development team the same questions over and over again. Use the search function in keybase. It works. We are all waiting on updates and the fruits of their labour.
And as for official recommendations, if they change there will obviously be an official announcement and the defaults in the client will be updated. On their website their is a signup for announcements by email, i recommend you all take advantage of this service. This is confirmed by the Chia Project here.