Jack Howieson could feature for the Eagles after tests revealed he had suffered less damage than initially feared in a bicep injury.
Aston said: “I wasn’t particularly happy with the performance.
“We kept our line intact, and respect to the boys for that, but I’m still not happy. We’ve got to be better than that.”
Assistant coach Stuart Wilkinson said: “Sheffield are a real threat. They have a certain way of doing things and we’ll have to be ready for that.
“We’re improved recently but we’ve still got a lot more that we can do better.”