I have been through a number of company consolidations and companies that have been bought by a competitor. One bit of advice, don't tell the new "experts" that show up how "things are done." Keep your mouth shut and listen. Even if they ask they really don't want your opinion.
It's their show! They have all the power. If you want to survive, don't argue or explain, just do what you are told.
If you can't, you will be marked as a trouble maker and marked for elimination.
Best of luck everyone.