BEXIL - I think you are missing the point a little.
Money will not solve the issue and its not managements fault either. To change the fonts is a relatively straightforward,but time consuming, matter once they have been defined. But no-one from Operational ATC is willing to put their neck on the line and I don't blame them.
Your idea about all ATCOs visiting the TDU is a very good one and I think is worthwhile, but how often can we afford (in terms of time) to do this? What happens if 70% are for the new fonts and 30% against, do we throw the changes away?
I don't put forward for one minute that I have the answer. I certainly don't envy the people charged with coming up with it.