Before you get too excited, consider that you also lose GL on autos briefly, the guaranteed crit on the Bootshine after PB, a Coeurl form GCD (net gain ~1 instead of the ~2 it appears to be), potentially DK/Twin alignment, and almost certainly some DoT uptime (monk DoTs have this shrinky stretchy thing going...). It's a short term gain like I'm sure most of us have suspected, and most likely an overall gain (haven't gotten around to checking, the above factors I listed should be enough indication of why I've procrastinated on that...), but it's not really 300 potency.
And the TK opener seems really impractical to me but I suppose it might squeeze a little extra on SSS if you really get it right (but then again, it's also probably not what SE had in mind...). I'm 100% sure a spreadsheet rotation listing every move for 3 minutes can answer that conclusively, at least.