"Undo" 7-second pause when a comment is posted isn't the best user experience

[#1]

Users are complaining that the 7-second undo 'pause' is disruptive, especially since the comment they just posted disappears during this time. 

Can we either a) add a global setting to allow us to toggle this setting off and on or b) change it so the text to appears during this 7-second window?  TY!

[#2]

There appears to be a bug that makes the page blank until the 7 seconds is up, thwarting any attempt to stop the post and edit the update.