> Adding glide between steps
We'd love to add but it's tough at present.
> allowing each pattern to run at a different step resolution
Do you mean half / doubled speed switching performance when the pattern changed would be fine?
Or would you like to control the resolution by each track?
> each step could be set from 0 to 100% probability of triggering.
Is that like a midi effect within Ableton Live?
Like an inordinate filter for sequence triggers of the pattern?