Hi Eric.
Although your dining reservations are 'linked' to your Magic Your Way Package resort reservation, if you made them online while signed in with your Walt Disney World profile, there would be no need to change any of your reservations if your package offer or pricing should change.
The dining plan itself is not affected by your reservations until such time as you present your Key to The World Card to your server at each dining location you visit during your stay.
Keep an eye on the Walt Disney World website's
'Special Offers' section often!
If a new offer comes out, call (407) 939-7675 & mention that you have an existing resort reservation package & would like to switch to the "such & such" offer. The Cast Member will advise you of availability under the offer & can even help you compare to determine what's best for you!
Wishing you all the best as you make plans for a Magical time at Walt Disney World!
I hope you'll visit us again Eric if there's anything further we can assist you with here at the Moms Panel!
Kirsten