Don't see it happening. Keita is going to be given more time. We already have Wijnaldum and Henderson. Grujic is coming back from loan. We might lose Milner to Leeds in the summer but I think our priorities are left back, winger and striker/forward.
Plus we've got Shaqiri & AOC to add to the mix. If it's going to get culled in the Summer, I guess Lallana might go (there was interest in him in January), Grujic will go and Milner might get his retirement move.
I can still, for some reason, see Klopp going all out for a top playmaker, because for all of the other 6-8 players attributes, I don't think any of them fit the top class playmaker bracket, as good as many of them are.
I think longterm, Klopp's idea has to have been for Keita and Fabinho to occupy central midfield, and for AOC and Shaqiri to then battle it out for spearheading the three, but I think in the longer term, he might invest (big) again.