I think that the issue really is that both Tade and Foran are not goal scorers - they are chance creators. In another time, Foran was a big goal scorer, but like Ross Tokely his attributes have changed over time and a new role for him in the team has to be found. I believe though that the problem can be resolved simply - a switch to the 4-3-3. At this moment in time, both Hayes and Doran are out and Chippendale only seems to get on the bench for some reason. Neither Ross or Davis are real out and out wingers and are both far better down the middle.
Lets look hypothetically for a moment - a ball playing midfield three of say, Davis-Tansey-A.Shinnie have all the necessary attributes to play the ball forward and create chances - this is in-turn helped by the use of three men in front, preferably Tade-McKay-Foran. The midfield three can play the to the front three which could easily allow for more opportunities for Tade and Foran to do what they do best - creating chances, and with the addition of Billy McKay as "the finisher", profiting from the work of those around him. A front three of this type could also allow both Tade and Foran to pull wide and exploit flanks, something some believe they are better placed. Perhaps this is the solution to the goal scoring problems.