The gaffer, who was hoping to see his side return to winning ways following their defeat to Accrington at the weekend, admitted that his side need to be more ruthless in front of goal, although Shrews stopper Joel Coleman did pull off several superb saves to protect his clean sheet.
Speaking via the Express & Star, Dean said; "I have no idea how the game stayed goalless. We’ve created chances but we need to be more ruthless, although, yet again, their keeper has pulled a few decent saves off.
"It’s fine margins and we are just falling short at the minute but it needs addressing. Liam made two decent saves from distance, we kept them to efforts from distance.
"We need to look at ourselves – we should have put them to the sword, we should have taken our chances. It’s frustrating. We will take the clean sheet out of it but, for us, it’s two points dropped."
Tuesday evening's result means the Saddlers are now winless in their last five outings at Banks’s Stadium and whilst Keates admits his side need to improve, he isn’t too worried as they continue to enter some good performances.
He continued; "I wouldn’t say I’m worried, it’s a concern at the moment. It’s still very early days and there are bits and pieces we need to work on.
"We had opportunities to get decent balls into the box and we’ve made the wrong decisions. It’s something that needs addressing over the next few weeks."