Steve Harmison thinks Eoin Morgan should replace Trevor Bayliss as England coach after the summer Ashes series.
Good performances from the likes of Chris Jordan and David Willey have made Bayliss' World Cup selection decision tougher.
England will finalise their squad for this summer's World Cup on May 22.
"One of the difficult things is we've got six guys that are probably suited to batting six or seven."
"Keaton is struggling a little bit," admitted Bayliss.
Trevor Bayliss ranks Jos Buttler in the "top echelon" of players in the white-ball cricket after the he helped England to a ODI series whitewash over Australia.