While I agree a mass clear out may be required you have to ask yourself two things (i) the current squad are not performing consistently to their potential so unless that is addressed we will not necessarily see any improvement (ii) are we actually going to be able to attract better players than those we already have given our funding situation and where we are in the licensing cycle.
I suspect the quality of the squad next season won't be fundamentally any different than that we have now. It might have better balance if some of the more obvious weaknesses are addressed. However, I doubt we will be able to offer long term contracts and thus will lose some of our better players.