I can't really speak from a development-side of things, but I can at least refer to this topic through my own pov as a person that has a long history of duelling.

I don't really support this idea, automating a process that sometimes actually needs human engagement is not the way to go. I've had countless duels where someone pinged first turn, or had to leave the duel for an hour only to come back later. Both cases rely on some sort of empathy, which the automated process won't have. You pinged first turn? maybe even turn zero? this game is voided and either it goes void with tc (like self-betting on yourself in a bet server and pinging) or you lose a point that you can't take back. This to me takes away the spirit of duelling and doesn't really serve enough purpose to put dev time towards.

Then again there are people supporting it, so maybe there is a bigger point I'm missing.

The tc sending command is handy, but it'll just end up a thing new players report for being lured into doing