You cannot change the whole team to accommodate the deficiencies of one player , mate. If he cannot adjust to the new tactics(The Tactics merit a separate discussion and one we've had too often), he was not so good to begin with.
The fact that we've looked and played better without him says a lot and although the reasons for our playing better are open to debate , you cannot deny that the other two players filling him have done better than him.
we've looked better without him ? lol
we've looked better without Poulsen, and Skrtel-Soto at the back. Johnson ain't the reason we've looked slightly better. We missed him so badly against Everton when we had some good spell of possession in second half. We would have created more scoring opportunities with him against Blackburn.
Johnson is world class, but just been off-form. I rarely ever over-rate players, but Glen is criminally under-rated.
He is absolutely dominant when played in the right system (the system world class teams play), but since we ain't a WC team, he looks bad. Play Dani Alves in our team and he'd look as poor as Glen. He had his bad moments and his biggest issue is lack of confidence at times which cause in lack of concentration (which is an issue for a lot of top footballers too), but he is a top top player, with amazing talent and ability. He's shown it numerous times that he can dominate the right flank being a RB, beat opposition fullbacks left and right, take shots, cross the ball, make key interception some great tackling which all go unnoticed.
He just needs a goal, or a few positive results for the team to get going again.
bottom line is, Carra and Kelly ain't 1/10th of the player Johnson is when playing RB.
form is temporary, class is permanent.