GOautodial Open Source Omni-channel Contact Center Suite

I'm having difficulty summarizing what I'd like to see Goautodial do...

lets say i have 2 agents available, and im set to autodial at a ratio of 2:1...
Goautodial will be calling 4 leads...

Now lets say 2 of those 4 answer, and my agents are busy in those calls, that leaves 2 lines ringing until call progress changes.

I think it would be useful to set some rules around when Goautodial will stop ringing those "overhead" lines.

for example, in a busy and active campaign, Goautodial may start dialing a new line, and has only been ringing a few seconds. If all agents become preoccupied in active calls for 5 seconds or more, then that agent may not be available for a good few minutes, and Goautodial should therefore stop ringing a number....BUT if an agent is in the dispo screen, it should perhaps continue ringing the line since an agent is moments from becoming available....

Any of this seem useful to anyone else? I'm pretty sure Goautodial cant do this at the moment, but how could something like this be implemented?

Thanks