I dunno if Frank can be "fixed" with just a few games off to reset. Admittedly I don't mind his inability to score as much as some because with his D he can make an impact even if he remains Andre Roberson on the offensive end...though his improved (despite still needing further improvement) handle, his effectiveness when he actually gets a screen, his shot mechanics & that his misses are very consistently not off by much & just rimming out; give me optimism. It's not working yet, obviously, but I think that getting some more polish on that shot over next summer, will make a huge a difference and help start bringing his offensive game together; especially if the handle continues to tighten up.
A lot of Frank's "problems" come from Frank knowing that he sucks offensively right now and so making "the smart play" instead of forcing up trash that's unlikely to go in. Problem is that until that outside shot starts dropping for him, he won't have the confidence to develop his scoring in the paint enough for that to ever become "the smart play" like it needs to be if he's to ever be a lead guard. Which creates a bit of a catch-22 until his work in the gym turns his outside shot into a reliable enough weapon for him to start building his game out from.
So I don't think there's any "fix" for him other than time and patience. I don't mind Frank getting a few games off if he was starting to get down on himself, as managing a kid's self-confidence can be just as important as pushing/challenging them...especially with how hot Mudiay has been since returning to the lineup. But we need to accept that Frank's not going to provide much offensively other than consistent distribution until that 3ball gives him a weapon to rely on...which it's just not yet.