LOL, ok thanks for the warning. But I'll try to give you my insights:
I'm actually not that representative of your average Steeler fan (most of them are fairly uneducated and suffer from an extreme case of homerism, and a lot of them are racist). But I have listened to Pittsburgh sports talk radio for about 25 years now and feel like I have pretty good sense of the situation:
1. I'd say it was probably a 5 at game time. Hell, even the week before there were people that were rooting to simply win to eliminate Cleveland, because, well, "they're Cleveland".
2. Now, after the loss, it is probably a 6. Next year Steeler fans will certainly be more amped to "get revenge".
3. Steelers-Ravens about 7 or 8 years ago was an 11. I've seriously never seen a rivalry in sports more intense than that rivalry a few years ago. Now, its around an 8 I would say.
This is no offense to Cleveland or to their fans, but from a Steeler fan perspective the Cleveland-Pittsburgh rivalry had really faded away, mainly because the Steelers were winning the very large majority of those games over the last 10-15 years. But, now that Cleveland has a superior team (and a brighter future, I'd admit) that rivalry is going to grow again for sure.