The problem is that you want the wording of equal parenting, but don't want to call it that.
The fundamental flaw in any proposal you come up with is that the person who is CP automatically must have greater rights than the NCP parent. For the simple fact that they are "more" (by standard of time) responsible for the child than the NCP.
No wordsmithing can change that.
The US is rife with grand language about time with NCP and CP risks loss of custody if they interfere, but the reality is that nothing is done except in extreme circumstances.
So long as that mentality is permitted to remain among judges, no proposals nor posts will change anything. This is the key.
Good Luck,
Joe