We ask donors to consider increasing their gifts each year. It has been a barrier to some that they have to end their gift (they don't want us to be confused when we recieve a message saying they've stopped their gift), and start the process over. Someone giving $XX should have the ability to simply increase (or decrease if the need arises--this seems like an option that might prevent some donors from stopping altogether when their financial situation changes for hte worse) that recurring gift amount to $YY without having to cancel and start all over.