mmm?, my day job is animating build and construction sequences so I have many ideas. I see Railclone as a modelling tool, not sure how it would evolve as an animation tool also, but it would be very powerful to have. Knowledge of some basics possible would be helpful.
my tuppence worth ... growing pipes and 'lines', (as above), animated floor / ceiling tiles so 'waves' can be created and animating opacity on individual segments, (maybe splines could be used as gizmos), animate randomisation in materials. There are scripts that do this but they all involve collapsing the RC, so keeping it 'live' longer could be useful at times.
Anything really where you can envision building or demolishing in that typical '3d magic' way that everyone goes for that uses opacity and transform in a sequence. I suppose you have to get around the 'instancing' engine first.
The screen grab below for example shows a typical slab being cut into sections, falling on the Z axis and disappearing.