Ability to rotate slabs with only decorations 15 degrees

What Feature would you like to see included within TaleSpire?
Currently if you select a slab consisting only of decorations it can only be rotated in 90 degree increments. If a slab contains only decorations (no tiles) it should be possible to rotate in 15 degree increments just like the decorations it contains.

What situations would this Feature be useful?
I am

Making repeating patterns using slabs. I am currently trying to make a board with a large U shaped waterfall consisting of a slab with ~1000+ decorations (ice/rocks). Manually recreating the slab in increments of 15 degrees is basically impossible. This limitation basically makes the board i had envisioned practically impossible.

Additional Thoughts/Details

Assets for waterfalls and flowing water in general would be a huge plus (directional tiles with an animation flowing in a direction). I will submit this separately.