Can anybody help with this? Any guidance is appreciated.
Couple of things to consider...
Do you need your default page to change completely, or do you just need it to look a little different?
If you override the "Homepage" Route, the View/Home/Index.cshtml will never get hit, and you will not have a default catalog landing page unless you also provide entry to categories, products, etc, on your homepage. So if you can provide a little detail on how you envision your app working, it will help the recommendation.