All Systems Go:
I think what you are referring to is the 'TDB Presentation' option where you can indeed change the size of TDB font from Small to Medium to Large. The problem with setting it to large is that the TDB then obscures or overlaps others making the screen very cluttered.
What most people are complaining about is the size of the font on the Planner's strip bays, the Flight Data Editor and the Full Flight Plan. The font size on these is not changeable, and although I am told I have very good eyesight I have difficulty reading the figures on these. Indeed, I get an eyestrain headache after 90 mins planning (as happens often now since we have barely enough staff). If I return to planning again after a 30 minute break then it gets worse.
Take 3 Call 5:
You surprise me. I had always understood that the intention was to make NERC stripless but concerns about systems failures meant that a method of displaying paper strips had to be devised afterwards.