While you enjoyed the advice given to you about possibly getting an emergency residency order, you know your daughter isn't in any danger, so would you really do that to her? Because she'd be the victim.
".i asked her to explain why she has changed the arrangement SHE made . and she says it’s better for my Dd routine???"
Shell get an opportunity to explain that to Cafcass and the Judge.
Access does often have to change once they turn 4 and then when they go to school. They are more tired etc and a routine is better for the brain to process the new type of learning.
Access days don't count on events such as Birthday and Christmas. They should be negotiated separately. Acess does have to become flexible as after school clubs/friendships grow. Or the child misses out.
You don't have a secret weapon in the recordings that you have, the Judge will not get into tit-for-tat. If you make yourself look petty, that will go against you. Her behaviour could be seen as a reaction to verbal and emotional abuse, because that's what those nasty texts were and it sums up your opinion of Women.
She has a right to make a life after you split and as much as acess is for the benefit of the child, it does have to fit into the resident parent's routine, as well.
The Court will wonder why you didn't take action as soon as you found out about the boyfriend's past.
Again you've got to guard against looking petty. They'll ask you if you have any concerns about your ex having residency and if so, then reports will be requested and hearing dates will be set for when the Court has those reports.
If you left without your child, then they'll ask what's changed and when.