'Personally, I was glad to use them when I was looking for songs to sing'. Me too. You'll find nothing but praise for Frank from me. It took 4 of us, off and on for several years, just to check what he had collated. He never pretended that they were for any other use than singing, unlike the earlier collectors who didn't or couldn't be bothered with tunes. Of course when Frank produced those 4 volumes there was no internet or EFDSS website to check everything. All he had to painstakingly work on were the paper copy Hammond/Gardiner manuscripts.
To the best of my knowledge the Hammonds and Gardiner took everything down faithfully to the best of their ability as did Sharp.

As for Sharp avoiding anything bawdy, have a look at the 'Gently Johnny' thread.