Why would this be a sign that the site is going downhill? Is it common for companies like Purch to say they aren't going to change anything, and then change a bunch of stuff anyway?
Yes and no.
Essentially, everything will be the same for the first 9-15 months. But slowly, the editorial staff will begin to feel like they're not being listened to or that they feel pressured to do something they don't want to do. So you'll start to lose some writers. As new ones are hired, they will start to reflect the ideas and opinions of the parent company as opposed to the editor. So the editor will get frustrated and leave. This will probably take a couple of years at the most.
Now, the parent company will hire a new editor. This editor will take on the attitude of the parent company and changes will accelerate because this editor feels like they need to establish themselves in the hierarchy and will stray even further from the original site vision.
Now... Is all of this on purpose? Of course not. It's organic. It's changes that may even have been made by Anand (or whomever) were he still in charge but it won't FEEL right. Things will be off just enough so that long-time visitors will notice.
And the company that makes the acquisition will always say that they can't control what the site will look like in 6 months, 12 months, two years, etc. But it will come.
But I pretty much have checked out of this site as soon as Anand left. That was the plainly visible writing on the wall. The site is how it is because of Anand. He's like the Steve Jobs of this site. It was his vision and he was the one who said yes or no to things and he was ultimately the final word. His departure is the crippling blow. I'll still log in every once in a while just to check up on some things and conduct some business in FS/T but I'm basically done with the regular site.
Cheers!