Unless Fuller can start giving us four decent overs on a regular basis (and that isn't meant to sound like a criticism of his place in the team), I'm struggling to see what personnel changes we could make going forward. We're kind of stuck with having to do without any batting from no.8 downwards, because at best we can only rely on six overs from the top seven.
I suppose you could suggest Holland or Prest for Wheal. Maybe between them and Fuller we could cobble together four overs. But I wouldn't be keen on that. You invariably win t20 matches these days by having good batters and/or the good bowlers, rather than bits and pieces cricketers.
So all I can really suggest is that our top order get their act together with the bat, and fast. I think I counted a total of two 2s in that innings, which is shocking. We lost more people caught on the leg side boundary than that number of 2s.