Some variable-related side effects I have noticed:
Yes/No (used to be a single checkbox defaulting to No) has been changed to Yes/No/I don't know radio buttons. If I make the variable non-optional, it offers just Yes/No, but there is no default. Waymarks posted in the past have this variable set to Not Listed instead of No.
Dropdown boxes and ratings now default to "None Selected".
URL links used to have a constant description (the variable description text), now there is the URL value, which looks ugly for the long URLs.