I agree mate, credit to United but Leicester and West Ham didn't really play that well did they.
I think that the Shaqiri sub should have really come earlier in the game and probably for Firmino instead. Yes we missed Bobby, his the nucleus of our front three. I also think Trent was a massive miss, especially with you explaining how the full backs aim to overload areas upfield, I think having him in, instead of Milner is even more of a miss with this in mind.
Back to Henderson, I think it comes down to consistency also, if he plays as he did against Bayern I would have nothing but praise for the lad, he was turning and first thought was to move it forward, played a couple lovely balls over the top.
Don't forget instructions from the manager as well.
The little balls over the top were clearly an instruction, so we could push Bayern deeper, and THEN create overloads.
Usually, we see Henderson playing it long to the fullbacks.
People seem to forget that the lads play to instructions.
If Klopp wants the fulcrum of attack to be wide, that's where it goes, if he wants to push teams deeper, it's passes over the tope, when we want to draw an opponent out, we drop back, pass it around a bit then pass into the spaces left by the opposition pressers.
Creating space is a big thing, and yes, Hendersons passes to the side and back do that by drawing the opposition out.
It's basically re-setting to go again with the sapce created.
All it takes is one opposition player not getting back quickly enough after pressing, and it can create a chance.