I have kept up on reading but not much time lately to respond to you....
How is your attitude regarding your wife's parenting skills? Have you made progress with this? One thing I notice is that you post a lot about taking the kids for ice cream, McDonald's and the arcade..... (almost every time you post about having the kids you mention a treat) so please honestly evaluate how often YOU are giving treats. When you interacted with your MIL about wife it wasn't positive and (to me) it seemed like your view of her hadn't changed.
As for dating, my opinion (if you want it, lol) is probably not a good idea. Has NOTHING to do with saving or not saving your marriage but with you having grown add a person and able to be alone and HAPPY to allow a partner to be the icing not the cake. Don't use female attention as a crutch to get over your wife.
Me: 35 husband:39 Sons 16 and 11 from my first marriage Twins 5 (boy/girl) Daughter 3 Affair bomb 2/27/14 He moved in with ow 3/13/14 OW kicked him out 6/15/14 4/2016 he seeks help for sexual addiction