That's disappointing, given the form he was in and the consistency we were finding with him in midfield.
However, Henderson-Can-Coutinho isn't in any way a bad midfield. Coutinho slotted in brilliantly against Swansea, he was fantastic in that second half. The only concern might be that these players haven't built up any kind of rhythm together, haven't really played together this season. However, we have see Can return from injury to go straight into a big, big game before, and he has been fantastic. I have no concerns about him at all.
Height wise, we probably gain a bit more with the Can/Wjinaldum swap which might be important.