Forcing big tech to act like big dumb pipes is a fantastic idea that deserves to catch on. For accounts I care about though I just wish it was more discreet with QR codes blended into pics and plausible deniability baked in i.e. used legible 1337speak w0rd5.
It's a surprisingly fluid copy+paste process even with a mobile cursor inside a buggy p2p collaborative text editor [1]. I encourage others to real world test the mobile flow over a completely insecure connection.
[1] http://97.107.136.211:8000