Full disclosure: my daughter and I are roller coaster afficianados*. I've ridden
more than 180 different coasters so far, and will check off probably another five to ten this summer. We live on the more intense side of the spectrum. So our opinoins about "thrilling" should probably be taken with a good tablespoon of salt.
We were
shocked at how forceless Slinky was. I mean, it looks like it should have some pretty decent floater air on the double-down in the first half, the hill out of the second launch, and the bunny hill run near the end. Not a single one of them delivers. Honestly, it's a pretty serious feat of ride engineering to build a layout that
looks that interesting but does not ever feel like more than a crusie through the countryside. (The bunny hills feel a little yo-yo-y, but only because the angle keeps changing, not because you go through them fast enough to matter.)
Anyway, my daughter---my Disney-loving, grew-up-with-Toy-Story, daughter---got off and pronounced it a one-and-done, to the point where she told me she'd rather not use a Tier One LL on it if she was in the park with me. It's better at night, because the lighting package is neat, but....meh. Just meh.
All that to say: I don't think anyone would find Slinky too intense.
This is how timeshare exchange works. You can't exchange into something until someone exchanges out of it, and that happens in dribs and drabs. More importantly, the "good stuff" does not last very long just sitting around before someone takes it, and the "really good stuff" never even makes it to online inventory---it is matched to someone's ongoing search first.
So, if you have some pretty firm ideas of waht you'd like, it is much more effective to enter an ongoing search for it.
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*: If you want an intense bunny hill run, try Magnum XL-200 at Cedar Point. This was one of the last few coasters designed by hand rather than by computer, and has had to be re-profiled in a few places after opening to smooth it out. The short hills on the run back to the brake run provide what folks often call "ejector air"---if you were not belted in, you'd be thrown out of the car. That's particularly great in what's called the "ejector seat" or "magic seat" in the third row of the first car. (ProTip: The queue for that row is often obscured by the people waiting for the front row, so paradoxically it is often the shortest line in the station.)
(PS: To avoid the lapbar-thigh pain, keep the belt *very* tight, and that will help.)