if, for example, the community says we should never show the regular expression or equation-based validation equations, instead requiring people to enter something into "help" to explain the validation in human-readable terms.
Just my two cents, but I can't think of a single instance when you would want survey respondents to see a help message containing a regular expression. It's incomprehensible. And I don't think we'd want to use the "hide tip" box to hide ALL tips on the question. Unfortunately, maybe there also needs to be a Validation Help text field next to the regex validation field?
A lot of end users are going to be pretty confused about all this