I just think the higher up the pitch his stock position is in a game the less effective he is as each role requires you to bring something a little different to the side. It's quite clear that he has a good understanding of all the roles in midfield but doesn't necessarily have the skillset to play all of them at an elite or close to elite level. I like him as a 6 and if we switch to a double pivot at some point I think others will find it hard to dislodge him from the side.
Not sure I agree with this. His early career was very much as an attacking player (winger, 2nd forward, attacking midfielder) on account of pretty good pace, power, low centre of gravity, and good close control. Naturally at 28 he's lost a bit of pace but his technical skills are very good still. I think he's strongest when the team is playing high tempo stuff in advanced areas. He possesses clever movement, a good first touch and has a powerful shot. Like a lot of Dutch players, he is good tactically and turns up in the right place at the right time which is vital for scoring goals.
I think Klopp played him as a more defensive minded player than he has been used to because we didn't have a proper DM, Hendo was still becoming accustomed to the role, and we needed a deeper CM who was good on the ball, and good in tight spaces. Neither Milner nor Hendo provided this last season, and Lallana (apart from being injured all the time) wasn't able to play at CM. We also struggled for pace at the back before VVD came in, and without a genuine DM we needed better protection for our centre halves and fullbacks who were better going forward than backward. Wijnaldum has bridged that gap in our side, whilst Milner became more free to be the creative outlet in our midfield (recall the Milner had the most assists in the CL last year I think).
I think things have changed though. VVD is a colossus at the back, and our fullbacks are now much better defensively. When Gomez plays, its rare to see anyone outrun us at the back. We also purchased a genuinely world class GK who plays as a sweeper, and I think Fabinho has the ingredients to become one of the best DMs in the league as well. As a result, I don't think we need that same level of defensive cover anymore. I would suspect that we will see Wijnaldum revert back to a more attack minded role sooner or later. This will be a good shift because I think we lack goals from midfield and are overly reliant on our front 3 to do the bulk of the scoring. It is always useful to have goals coming from a few different avenues e.g. VVD from set pieces, Trent or Shaqiri on free kicks, and I think if Wijnaldum can get back to the more attacking player he used to be, then it will relieve a lot of pressure on the front 3.