Anyone working with FCP 7 in broadcast post production is probably still working with it for the time being, or at least looking at the alternatives. The strongest contender to replace FCP being Adobe Premier for cost and flexibility, although that doesn't exclude Avid.
FCP X just isn't a broadcast tool. All the apologists, simply want to forgive Apple for stripping KEY functionality out of a great product. If Apple put a camera in the iphone, but didn't give you the ability to print the photos off onto paper would you not see that as a bit of a step back? Tape exists in broadcast and continues to be used for both capture and delivery - fact.
Imagine if the new iphone couldn't read your contact information from your previous release of ios? These are pretty fundamental flaws and saying that a third-party plug in will deal with it, isn't really cutting it. If it's possible for a third party to write this code, why doesn't Apple add it as part of the programme - after all it was there in the previous version???
Running parallel to this is the fact that the Mac Pro seems to have been EOL'd. If you're dealing with full HD from Alexa or RED you aren't going to be using a Macbook Pro, it's just not feasible. Apple have stepped out of the professional film and broadcast market, the only problem is they haven't done the decent thing and officially announced it.
If you are using FCP X and it's working for you, then great. That doesn't deny those who's industries rely on it's predecessor who have serious misgivings about their investment in a solution Apple have diluted for the consumer market.