That type of thing is standard wording in an acquisition announcement - it's pretty boilerplate.

While it's possible we'll be pleasantly surprised, the history of small, innovative companies being acquired by much bigger companies does not /generally/ bode well for the smaller companies & their products.

If the Oculus product(s) is successful in any way, it would only be natural for FB to want some kind of hooks/integration, as just another surface area to push their brand/strategy/etc. Just like Google pushed "Plus" into everything regardless of whether it was really a good fit, because the parent corp is the owner/master and the subsidiary (or internal group) has to serve the strategies of its owner. It's not necessarily bad, it's just expected.

Maybe if FB weren't a public company we might expect them to be able to have a bit more of a hands-off approach, but since going public I'd say it's "unlikely".