Just so you know , the access approach works fine when ur dealing with few touchscreen app, once the number of users increase the SSIS implementation is going to be a pain to manage and worse yet could cause all kinds of data management issues.

Also what happens when u upgrade the application ? chances are you will have users with two or three different versions of the access database depending on whether they choose to upgrade or not.

If you want to redesign the system it will be easier to do now , than have it limp around for a few years before finally moving to a scalable rdbms