That’s also 2/3+ of the coasters on the same side of the park.If we were just talking about one ride in Festhaus Park, I would agree with you. That said, BGW is rapidly running out of cheap-to-reach expansion plots and some of the largest areas of currently-not-occupied-but-still-reasonably-guest-accessible land can be found in and around Festhaus Park. It's easy for me to imagine that a theoretical 2024 coaster could utilize Drachen Fire's station and then have the vast majority of its layout outside the railroad loop in the boneyard—retaining much or even all of Festhaus Park for future development.
Drachen Spire allowed ample room around it for many additional attractions and I assume 2024 will end up doing the same. At the current addition pace, I think we'd easily be within the decade when we can expect that land to be utilized. I agree that one more German coaster isn't a problem—but in two decades when there are three more German coasters, and four new German flat rides, that's a whole other story in my opinion.
Parking lot coaster/tree loss be dammed, they need to utilize Ireland/Killarney for a coaster.