Tbh, i was cheating the hell out of that bug I stripped the side armors of their armor, which makes it like a 57 ton mech. But now, they seem te be fine to me... They play a lot like the other mediums, they can just carry more SRMs and bigger engines. I enjoyed playing them the past week. You can turn them into 55 ton LRM boats. In 12v12 that might save you some tonnage if you had an Awesome or Stalker as LRM carrier. The Kintaro can safely bring 45-60 LRMs for 30 tons less.
Yes, it was a huge change. The Kintaro is really good at spreading damage now. To put it into perspective, I finished a match at 37% and not one of my components had been blow off. The lack of PPC/gauss also helped a lot.