I strongly with you that if conclusive information regarding use of surrogates became public, there would be an immediate outcry to remove their titles (and only half joking) exile them permanently. Lest anyone think there would be behind the scene maneuvers to hush it up and keep it quiet, think again. It would get out, one way or the other, and the resulting brouha would be far worse than any other scandal this royal family has experienced. It's my opinion they realize the cover-up is always far worse than whatever happened, and would grit their teeth, face it head-on, and then "carry on".
There are many people (and I was once amongst them) who don't understand that removing the titles isn't as easy as a stroke of a pen. The British Parliament is who decides it must be done, OR, as in the case of Andrew, the title is voluntarily relinquished, but fat chance that would ever occur with Harry. Harry's title and family ties is all he has. Charles is limited by virtue of the constitutional monarchy; his powers are not absolute.