If you "fancy" a holiday in the US there are millions of reasons to still come. You will NEVER experience scenery like the Grand Canyon, the national parks of Utah(Arches, Canyonlands, etc) , the dark skies of the American West for...
You've gotten some good advice already, erratic flight usually indicates needing an IMU calibration (follow instructions in the app). Hopefully the replacement sensor parts are new and from DJI only, not 3rd party or used..