If we hypothetically don't sign anyone, I can see two viable theories about it.
First, KSE is a bit over Arteta and Edu, and they've been told there's no more money till summer and they need to progress without it.
Second, they've decided we've got time and to keep calm, Arteta's got full backing for the medium term project, they go back to their supposed summer targets and condition themselves to finishing this season indifferently.