I bought my 7D new back in late 2011 and I love this camera. After the v2.0 firmware, it is fast, has a great buffer size and supports very fast speeds of CompactFlash cards.
Every camera has limitations, no matter what body it is. Some more or less than others, but they still exist. But here is why I love my 7D and even IF they release a 7D replacement soon, I will keep my current set-up for quite a while.
1) The image quality of the 7D is impressive, even at high ISO in decent light. If you are one who shoots constantly in low light a crop sensor is not for you anyway, so this doesn't apply to you anyway. I have hundreds of good light, high ISO (ISO-1600-3200) shots that are detailed and perfect for print, even without any kind of noise reduction done. Guys, they look great in NORMAL print sizes (even up to 11 x 14) Look if you are a "pro" and you make billboards for advertising, keep your comments to yourself. You wouldn't own a 7D or any crop body anyway, good grief. This IS NOT directed to you anyway.
2) Even though the 70D and Nikon's latest crop body, the D7100 are impressive cameras, they cannot keep up with the OVERALL speed of the 7D, either in fps OR in clearing out the buffer quickly. That alone can make or break the nest shot.
3) The AF system on the 7D is fantastic. Even when I am using my Tamron 1.4x teleconverter, the 7D still locks on 98% even in dim light. The 7D WILL AF at f8, quite a feat in it's self, even if it's not an official spec from Canon.
4) The body and menu is still 100% modern and is build like a tank. I plan on using my 7D for years to come.
5) The last and most important. IF Canon makes a 7D replacement, I DOUBT the camera will produce an Image that is (guessing of course) $1800.00~$2200.00 BETTER than my 7D.
Until such time that the cost to fix my 7D outweighs buying another camera body, I won't switch IF a "7D2" comes out.
Just my 2 cents, take it as that.