I think Koeman has implemented the style he wants and we're playing it
We aren't yet.
We found a good way of playing between Jan and April last year but unfortunately we burned out as soon as Rom's goals dried up.
The only time we've played the football Koeman wants us to this season IMO has been the first half vs Hajduk and the first half vs City - both different types of games.
It'll come. People have just got to be patient.