The first port of call IMO should be the selectors as these guys seem to be in way over their heads. Only then do I see them dropping the 5 batsmen/4 bowlers experiment that obviously won't cut it against the top teams.
If this new administration is really about change & has any kind of street smarts they would find a way to bring C Lloyd into the fold & that would build up a lot of good will & get the doubters onside.
The "Test" team could do with at least 2 changes but that looks unlikely with Butts, et al.
Any of Gayle, Samuels, Ramdin or Sarwan, if he can make back some runs, are all viable alternatives to lead as they actually make the team on merit.
The T20 squad is close but the ODI line up could also benefit from numerous changes. Even shiv might be persuaded to have another crack at it.(provided they reconsider his ODI status
)