+1 (or rather +10) to the request above.
Seriously, why are we locked in a game once it starts ?
Currently I'm kind of into Keltis Card, and sometimes the start of the game is sooo bad that honestly, all I want to do is say "ok gg, I concede". I know, I know, sometimes if you suffer through a horrible start, you may still end up doing very well. I've won at least once with no wishing stones. But that does not mean I want to suffer through it.
@Jeremy : perhaps you don't want people "forfeiting on you", but what if your opponent is no longer having fun ? Sure, there's your fun lost as well. And I think the board game etiquette IRL is generally to finish games (although it would depend on the particular situation). But there should be the option to "propose to end the game". So that it's bilateral. If both players agree, they can stop.
I'd like to point out that I play >90% of my games against bots. I don't know the stats on the website, but it should certainly be possible to unilaterally stop a game against a bot.