Likewise, Minim's example for the Floater only considered the case of wanting a vertical vs. a diagonal trajectory to have a lemming go or not go into a trap / fire object.
However, at its core, the Floater / Glider simply preventing a splat is usually an advantage.
While I agree that for Disarmer levels, if you want him to disable just one of two triggered traps (i.e. force the player to find a different solution for the second trap), it seems like overkill since you can simply use a permanent trap - splat-height drops are much more common.
You might find yourself wanting Floaters to solve one splat-height drop, but not all the others in the level. After all, that's one of the main reasons why the Slider is also being discussed as a potential non-permanent skill, because people generally like the idea of a non-permanent Floater.
The Swimmer even has a non-permanent skill equivalent already in L2, the Kayaker. Of course, the post by Minim I'm referring to was written before the introduction of the Shimmier. Now however, you might find yourself in a situation where you have several water ponds - one to be covered by a Swimmer, one by a Shimmier, one by a Glider, one by a Platformer etc.
For both situations, in order to enforce them, you would have to place the skill-remover object in such a way that there's no way to bypass it. For example, by surrounding it with steel / fire / one-way arrows etc. If all lemmings or at least the worker lemming(s) MUST go through it, you can put the player at a disadvantage fairly (because the object is clearly visible from the start, hence the player can plan the route with it in mind).
And I think these situations whete permanent-skill removal causes a disadvantage for the player would result in even more interesting and challenging puzzles than situations where the object helps out the player. In short: Yes, I very much support the introduction of such an object!Probably more like a fire trap, i.e. non-triggered. It would be weird to have a bunch of pre-assigned Climbers walking through such an object, with some of them losing their skill and some keeping it...