For consistencies sake it may be worth keeping the modifyconfig/updateconfig functions. If your working from .750 example module then there's no point. But in the .760 version some new hook types have been added. These are modifyconfig/updateconfig hooks. These hooks allow additional options to be added to the modifyconfig page of a module by other modules.
Also where possible key the user
API's consistently named; get to get an item, getall to get a set of items etc.
-Mark