I'm really anxious about the prospect of 50:50 shared parenting with my STBXH. I totally support very regular contact, weekend and overnight visits but I know my ex is fighting for this to avoid cm. Even though he has been involved in dropoffs and pickups and bedtime (which he's pushing for now to establish a status quo), he has not shown an interest in my dcs affairs in the past - doesn't ask about their day, has never organised a playdate (despite being at home a lot), birthday party etc, does not know their friends, has bought them a handful of toys/clothes in the last 6 years etc, and really struggles to soothe them when they're upset etc.
He is incredibly competitive and must win at all costs, even if it harms him/them in the process. This means that he will not/does not tell me if he's had any challenges with my dcs, if they have been distressed whilst in his care etc.
To prepare myself for possibility of a 50:50, it would really help to hear other's experience of the impact on little ones (4 & 6 yo) and any thoughts on what plans (one wk-one wk, 3 days/4 days etc) have worked best for other's dcs. I'll have to suggest preferable options at some point.