This is somewhat true. Our sensei's comes from a long line of Judokas before they switched to BJJ. We have Judo night, only once a week. Most people avoid this one night on the grappling mat, including myself. I'm good at breakfalling. I just don't like it.
I disagree, the MMA class by itself, integrate striking and grappling together...right from the beginning and all the time, much better. Speaking from my experience, I've competed & medaled in BJJ only matches (blue belt) and fought Muay Thai, where I train the most....and of course, watched a ton of UFC's. But I never trained MMA. The first time I did and sparred pretty hard in MMA, and got grounded and pounded in the head (50-60% power), there was a distinct feeling of panic that went through me and I tapped really quick. This happened like 2-3 more times with the same guy who I've always destroyed in Boxing or Muay Thai class. He's getting payback. He's also better than me in BJJ though, most due to his size (we're equal in BJJ exp.) Just that he was way more experienced in MMA. I quickly got used to it though and adjusted.To separate striking from grappling make sense. It's easier to develop your striking skill and grappling skill separately and then integrate both together.
BJJ concentrates more on the simple and less riskier takedowns, rather than the spectacular Judo throws. No doubt that O Goshi, Uki Goshi, etc. all work. See plenty of Judokas fling BJJ's into the air at BJJ tournaments. But they're still more riskier than simple takedowns. BJJ do train breakfalls and throws, just not as well as Judokas. BJJ's emphasis is mostly on ground fighting. Just like Judokas, do train newaza, just not as much as BJJ.But to separate ground game from throwing is not a good idea IMO.