Regrets.

Your bridesmaids should be your innermost closest social circle of those who would be the first you contact to vent/celebrate, etc regarding your relationship. Never ask in laws or anyone else out of obligation if you are not bff’s. Asking someone to step down is a friendship ending move but it sounds like you don’t mind if that happens. Better to cut your losses than to have someone in the group you aren’t comfortable with.

Since you’ve already asked you should stick it out but if they give you any trouble or don’t communicate with you then there is no reason you shouldn’t drop them. It happens. But if they are a “good bridesmaid” then keep them!

Asking someone to step down from being a bridesmaid is generally a friendship ending move. If this is someone worth keeping around (notwithstanding that you aren't as close anymore), demoting her may be a poor choice.

Personally, I would keep things as is. It doesn't sound to me like there is anything that's happened which is worth ending a friendship over.

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Agreed.

You shouldn't have asked anyone based out of obligation or a past relationship, but since you did I think you should keep them unless they turn out to be a bridesmaidzilla. "Taking back" a bridesmaid invitation/request, is a friendship ending move and would ruin any lasting bit of relationship you have with them.

This is YOUR day. You shouldn't have to worry or feel uncomfortable at all. Ask yourself this question "will this person add to my day in a positive way or a negative way?" If it's positive then keep her in your party, if it's negative then I suggest your remove her from your party. It may upset her but as your friend she should respect your wishes. You could always say that there is an uneven number of men to women so she won't be needed as a bridesmaid. Whatever you choose to do, I wish you all the best on your wedding day. Congratulations.

Wait and see if she accepts or declines. This may turn things around positively for your friendship, or end things.

Removing her for no reason is very likely to end the friendship, and may make you look ungracious. I would leave her in.

It's no longer just "your" day when you involve other people.

I would NOT univite her. It could cause major major problems and more stress than just keeping her.