This may apply to other types of modules, but the Search module is the
one where it is most prevalent to me.I would like to see the search
module interface changed to be easier to work with in environments where
there are a lot of custom fields. Instead of it loading every custom
field in the system as part of the Search Criteria and Outputs, have it
only load the system fields by default. Then have a place where you can
provide an ID of the custom custom forms whose custom fields you want to
be...