I think it looks pretty solid. Have you thought about lifting from a dead stop rather than touch and go? Last I checked one of the coaches here was very much against the touch & go because it usually leads to inferior form.
On the heavy set it looks like maybe you could have a tighter core to prevent the rounding in the spine. On the other hand I think that's hard to eliminate when you go really heavy.
Have you seen this video? Shamelessly stolen from another thread here