I'd say the idea of replacing this squad (well a good portion of it) was a 'reasonable' idea. Because this squad has had plenty of chances. But equally its fair to say Koeman isn't getting the best out of this squad either at present. He's made it clear he's not happy with them and its showing. They either needed to respond or not. And they haven't. To me this squad needs an overhaul. Old players and uncommitted players not in tune with the manager. Koeman should have done better at getting them onside and then systematically changed the squad. So I agree to an extent (he could have done better so far).I don't believe the idea that the squad needs replacing is a reasonable one because I don't believe that's the real issue. its being used by people to hide behind the truth which is koeman is not getting what he can out of the current bunch.
Now what we've got is a period of uncertainty. But things have to change one way or the other. Todays game will tell me all i need to know about this group. If they don't have a go today, Koemans philosophy or not, then they lack backbone.