Yeapp… that’s how it behaves even before the update. It happens to me so many times I got used to it. Even before SU5, when you add an approach into the MCDU, your ATC will show another option to ask for change of flight plan due to the changes you made. I understand you never came across this before because you probably never had the need to press this before since you’re already on approach and the AI Copilot doesn’t have the capability to choose this option anyway. But that option have always been there whenever you make “any” changes to the flight plan, adding SIDs and STARs included.
But if you do press this newly available option that appears due to you adding the approach, you will actually ask for a new flight plan into the same destination, and the ATC at the other end will give you a new clearance as if it’s a new flight plan. That’s just how it’s always been no matter at which stage you put the approach in and press that option. You assign approach at the departure gate, it will show the new clearance to choose in the ATC menu. You assign approach just before final, it will show the same new clearance option in the ATC menu. It’s the same thing.
The only difference now is that with the AI Copilot being added that capability to choose that option when it’s available, that it will always take the option whenever it’s available.
The problem to solve here is that they need to split SIDs and STARs and Approaches to be a part of the flight plan itself. So as long as there’s no changes to the destination, a flight plan change should not trigger at all in the first place. I think the ATC Radio assist is actually an improvement. But this improvement becomes problematic because now we’re starting to notice that there’s always been a issue in the way MSFS handles its flight planning process.