I've terminated the previous poll (What to do with Final impediment?) because there was already a clear majority (5-1), in favour of keeping the skillset and having "no bashers, no diggers" as a talisman.
I'm going to take it that this view applies to other levels as well -- allow multiple solutions in general (but eliminate trivial solutions like on "Let's go camping"), and if there is a particularly elegant solution, reward it with a talisman.
The question, then, is where exactly we draw the line between "acceptable" and "trivial enough to be fixed". We've already decided this for a large number of levels, so I want to highlight a couple that are still undecided:
Dolly Dimple. The intended solution is almost certainly the one using the small underplatform (else why would it be there?). There are at least two other solutions: sending everyone over the side, or sealing off a corner and digging in the corner with the last lemming. All of these use interesting tricks, so I'm inclined to leave them all in.
If at first you don't succeed.... We've agreed to eliminate the floor route. bsmith's proposal still allows another solution that I find almost as trivial (bash two pillars, mine the third one). My proposal of adding water would eliminate this as well (we could add terrain blocks under the pillars, if them being in mid-air is seen as a big problem).
The Great Lemming Caper. Keeping one lemming back by making him a blocker seems to me to negate the concept of this level, so I would rather prevent it (by removing the blockers). It's almost certain that using a blocker wasn't intended, because (in original Lemmings) the level comes earlier than No added colours or Lemmings.
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It's awkward to hold two discussions at once, but I don't want to lose the momentum going at the moment on talismans, so I've put up a new poll asking (roughly) how many talismans we should aim for. Mine and bsmith's lists between them have around 40 talismans, which is quite a lot, and we may want to rein them in and cull some of the less interesting ones. After this poll, I'll go through the lists, select the talismans that are most interesting and should definitely go in, and open up discussion on the others.
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Discussion on level ordering is still open. In particular, I'd like feedback on the ordering of ranks 4 and 5, which have had the least feedback so far.