The big logcat change seems to have happened more than a year ago. Is
https://alexzh.com/new-logcat-5-features-for-effective-android-app-debugging/ what you're talking about?
If Android Studio has upgraded your project to something that earlier versions can't handle, can't you take a backup of your project from before that update, and use that instead?
But in general, I'd advise to accept that software changes, and get used to it. Getting stuck with an obsolete version is not really feasible in the long run.