I think I know of ways to programmatically enter DTMF tones into a call but not how to accept calls programmatically. Is the DTMF entry all you are looking for? As for improving notifications, I generally work off of what is within b.m.o. Otherwise I take too much time/stress trying to hunt for people's suggestions rather than doing development or other things. If its a quick add I'd probably go ahead and do it but otherwise it would probably be a lower priority as DC's notifications aren't great and TOR is really meant to handle notifications well.