One suggestion for getting your child off her pacifier: Cut the tops off the pacifiers and "act like" you don't know who did it or what happened, it just broke! I had read this somewhere when my son was little and it worked great! He was about 1 1/2 years old when we got him off. Wait until they ask for it or want it, then just hand them the cut off pacifier. Then when they put it in their mouth, they quickly realize "it's broken"! My son did and said, my paci's broke and threw it down! That was it. He asked for it a couple of times later, but we reminded him that it was broken and he was fine!!! You'll need to make sure there's no pacifiers laying around that aren't "broken" that she can get to.
As for the bottle, she is much too old to be drinking from a bottle and it really is imperative that you just get rid of them. Stress to her that those are for babies and she's a big girl now. Maybe get a special cup or a special straw or something fun that only big girls drink out of. She is just regressing for attention it sounds. Keep emphasizing how she is the big sister and how you need her to help.
The diaper and potty training, good luck, girl! What an expense having three in diapers would be!!!!! She'll go to the bathroom when she's ready. She's obviously able to b/c she does it, but it's just that regression thing again. Really getting her to help do small things that help you might help her feel important. She's just vying for that attention from mommy. It's going to be really difficult with three b/c they are all so demanding. Rewards worked great for my two.
The bed is a big challenge. Because once they're in a big girl bed, then they're free to get out and come get in the bed with you during the night! That's what happened with us and we endured this for many nights/years! But she needs to be out of the crib. Her new baby sister needs a place to sleep. Maybe she could sleep in the same room with the baby so she can "help" when the baby wakes up at night. (not really, but she'll think that)
You have got to take charge of her now or she'll bring you so much pain later. You are the adult. God gave you these beautiful girls to raise. They are wonderful blessings, but challenges, too. You definitely have your hands so full right now! Good luck...