Despite the cost of our players, I think it's probably a bit much to expect them to improve in all facets in less than a month.
Even at the best of times under Koeman we weren't a great footballing side.
We've made great strides in terms of defensive organisation which is enough for me. Once the basics are ingrained, hopefully we can build on that foundation. I certainly don't think decent football is impossible with Allardyce's guiding principles (play the first ball forward, don't give it away in the defensive third etc.).