PokerTH

An option to manually muck instead of it being automatic.
Togglable the same way as the 'Away' options would be nice as well, so players can still auto muck.

Creates more strategic layers.

I don't really understand the question. You can always fold your hand if you wish. Or do you want to muck the winning hand? Also, there is an "autofold" option in the away tab.