The spinning believe it, or not, at least for the first spin is less intense than it used to be. The spin at the very end is definitely more intense, as it lasts longer.
As for the exhaust pipe spin part, I would recommend getting there first thing in the morning. They have two different sides of ride vehicles that operate. It is possible to get in one, while the other has no one in the other one empty if early enough. More than likely you should be paired with an empty ride vehicle, if anything if you see a decent amount of people, you might wait a few moments behind before moving forward to go onto the ride.
If anything if it does seem they're separating people and putting on both sides and there is a decent flow of people, but still slow, I would potentially ask a TM if it possible to have the other side empty. I would recommend explaining that you understand if it's not possible, but asking since you can handle spinning (if you say you cannot they'll just suggest you leave), but that you do not like the unpredictable spinning in the "exhaust pipe" section. However, like I said, they might recommend you not get on the ride at all if you admit any issue with spinning. However, it is a suggestion, or you could at least ask, but let them know you understand if it's not possible, but not explain why.