I think it's good to remove quit once reaching a skull rank. I mean there's no point of quitting! It just discourages players of trying, especially if it's ever a skull rank. As I hate quitters (as they mostly trigger a bug where the timer will stop at 00 because he quits.) it just takes all the fun away However, this also makes them negative on every fight. Like me, when I think I should quit, but did not and I won! And also, if this was never implemented, add "Locked Battles". Every player can enable/disable this.

Locked Battles- Meaning your enemy can't quit what so ever.
Normal- Enemy can quit.

I just really hate quitters as they always trigger a bug for me
Read here: http://www.supermechs.com/forum/viewtopic.php?f=405&t=32345

Read this if you are interested to know this "bug" that I am talking about.

Ok, that's it. For now... I am gonna post some other topics later on.