Coutinho happily signed an extension not that long ago. Players find it tough to leave Klopp and many found to their detriment at Dortmund.
If anything, Coutinho should see that he could be a vital cog in a side that could win trophies rather than a squad player for Barcelona.
Who would he replace? I guess he'd be one of the midfield trio but he's not going to replace Iniesta or Rakitic..