Tettey is many things, but the one thing he is not is a genuine pivot. He lacks the ball control, ball retention and passing skills of a genuine pivot, which is why we virtually always play him in tandem with a second "notional" DM, e.g. Trybull, McLean, Vrancic, Leitner, none of whom are particularly well suited to the role. A genuine pivot has the vision and passing skills to initiate attacks from deep himself, combined with the defensive discipline to hold his position and not go bombing forward leaving the poor CBs exposed behind him. Our tandem DMs are supposed to do, together, what a genuine pivot does singlehandedly. But since none of them are actually specialists in the position, they often end up slowing down the forward movement, only to then bomb forward, leaving vast areas of undefended space between themselves and the CBs. Re. the recent improvement, I think you can explain it in two words, Duda and Rupp. Both have made a significant contribution to our becoming far better organised out of possession. Rupp is giving Aarons the defensive help he lacks when Buendia plays, and covering his forward runs; Duda's contribution in defence has been massive, including closing down the space on the edge of our penalty area at set pieces and preventing shots from half-cleared balls. The stats for the last 4 games, in which one or both have featured, show goals conceded dropping from almost 2 pg to less than 1 pg, a GD of 0, and only a very marginal reduction in GF pg (1 pg as opposed to 1.07 pg). I know 4 games is early days, but the direction looks good to me.