1) I'm not going to download any file I don't know what it is.
2) I'm trying to be helpful. I do tempo and time signature changes all the time. I have none of the issues you're describing because I figure everything out and lay in my tempo map and guide tracks. before hitting that red button. All the parts I record line up perfectly - or as near to it as I can play - and I don't have to fight with stretching, squishing, finding and editing transient markers and forcing things to conform to other things.
Look, I'm not trying to start an argument. But you're trying to tell me that the way I do it isn't easier, yet I have absolutely none of the issues you're describing my way most assuredly does work and as a matter of fact until pretty recently it's the only way that could be done. Either that or you'd be spending a million dollars to make your record.
I'm offering a suggestion. You're free to take it, or not. It really won't hurt my feelings. It just never ceases to amaze me how when I suggest something simple and obvious that people such as yourself act like I've questioned their ancestry or something.