Here is my reasoning for their lack of activity in the current transfer market. It mostly stems from their owner's (King Power) inability to raise revenue from their airport duty free operations. For 2 years and counting their revenue has been greatly reduced to the point where the club has to sell players before it can buy.
Fofana, Tielemans, Ndidi, Maddison and Barnes have all been linked with a move but none have left. Schmeichel surprisingly left for Nice and hasn't been replaced by a new signing.
Still, they seem to have a decent squad and should pick up enough points to stay out of trouble, but you never know.