I'm going through this right now where all expectations have been reversed after an acquisition. Ex: I'm not big on metrics, I rather have direct communication with my team to understand issues we are facing and any challenge an individual is struggling with. Looking at metrics hardly tells you the full story. Well, after the acquisition, metrics are in! story points, number of comments on PR, number of PRs, etc.

I don't believe in these methods, but the company as a whole is going to align. I do not pretend I'm excited about it, but I remember that I am in a room with full grown adults. I've addressed the issue, and made sure to frame it with "we are aligning with the rest of the company" as opposed to just saying this is the way forward, deal with it.

Edit: Coincidentally one of my blog posts is on the front page right now and addresses similar issues -> https://news.ycombinator.com/item?id=45359604