If 4-3 is what you believe is best for your children, stand your ground. Do not allow your W's threats to influence you. Where did you get the legal advice that you would get worse than 5-2 if you went to court?
I would call your W's bluff. What do you have to lose? Just bc she says now (in order to bully you into doing what she wants) that she will get Ls involved doesn't mean that there will necessarily be an ugly battle. You can always agree to 5-2, right? Why voluntarily give up what you want right now?
You cannot negotiate coming from a place of fear. You (your kids) will lose.
Did the C agree that it was best (or fine) for the kids to have a 4-3 arrangement? If so, you can remind W that it's not about who suggested what, it's about the best interests of your children, and that's 4-3, thank you, have a nice day.
If I were you I would see a GOOD D lawyer ASAP.
me: 44 XH: 42 M 11 years D10 and S8 Bomb drop 9/27/13 D final 7/1/14