to clarify, your car is coming with corsas in summer but your putting goodyears on straightaway yourself at your own cost?
I can understand maybe if the dealers willing to swap them for you upon delivery, but imo (i may be wrong and other disagree) seems a bit silly to change straightaway if your doing it yourself given its nearly summer and corsas are whats meant to be on the car and are mostly fine as the weather warms up.
defo agree to put others on once the weather becomes inclement and once corsas worn out, but now june nearly upon us, id want to at least experience it with corsas for a couple of the warm months. maybe a track day as well to get use out of them? otherwise seems a bit of a waste unless of misinterpreted your plans.