I didn't mean to imply 50/50 was 'best' just that it's a good problem to have if their dad wants to see them.
Young or old it's hard to split time because as kids they need routine and it's hard for kids to have good friendships when they aren't home much.
If you make decisions in court they are going to try to make it as close to 50/50 as possible. However, if you can really show him you are going to do your best to give him time with the kids you'll have a lot more personal negotiation power to work out a schedule appropriate for their age. Maybe he can agree to only have them overnight on weekends or to visit them at your house for some of his time like you are doing now. Whatever you can do to show him you care about his time with them AND what's best for them will go a long way.
It's just hard to get to the place where you are working together if he knows he can get you riled up by asking for more time.
BD: Aug 2012 Separated since May 2013 S born Aug 2013 Aug 2013 H agrees to consider 'baby steps toward working things out' H is/was actively seeing someone?