After some experimenting (I realize it has been months since you requested steps and slopes) I managed to put together a method for creating stairs, slopes, and half-cubes! I'm pleased to at least say that it has been a success, and I will be working on the series in the coming weeks. It may take a while since there are various tiny details to refine in the final renders, but here is an example of what I've managed to put together!
There are a few details I need to work out, but it shouldn't be much longer. The software I work with does make it easier, but I still have to manually render and edit each individual step/ramp/half block for each tile type in the whole pack so it will take a little bit more time. Hopefully these are still useful to you, and perhaps others, when they are finally finished!