makes it more challenging to change anything if you need to later. 

What actual device do you have? Its a modem only device, feel free. 

It is only a modem.  But what would I need to change?

tough to know without a model number. 

T25 Arris

not sure if the app can do it but you can setup wan link aggregation with the t25 if the router supports it. If you have no intention of using it, delete the app. 

I have no idea what that means. lol  So the app just allows you to manage the modem?  It has nothing to do with the modem working.