First, Thanks for the update!
These comments are based to my first tests with 1.1.2 in mac environment:
From "my list" the most annoying bug is now fixed: step sequecer is now getting the correct (modified) pitch! Now it's possible for example to export audio correctly.
Also, mouse arrow positioning seems to be OK too in song mode (taking patterns to song row). Giving pitches with (same mouse arrow) in step sequencer is also better configured but IMO it could be still a little more precise. Now the value is few millimeters lower than peak of the arrow. Ok, maybe you can learn to use this but still I'd fix it if possible.
Decay problem (see the first post) is still there...