Hi Tumppi,
here are some comments to your suggestions.
Most of your requests are already on our list for future development (and some for current development 
)
@ 3:
How do you trim events? Does turning off the ‘Sync Selection’ option in the marker window solve your issue?
@ 5 & 8:
Did you take a deeper look at the Signal Switchboard in the ADR settings window? There are some options to automate the audibility of signals.
Cheers,
Bodo