hi, not bsure what the 5 s's are but we swaddled ds2 til he was bout 10 months as he was the same when we tried to only do one arm or sleeping bag. He just couldnt stay asleep with arms free as he would rub and scratch face in sleep and would wake himself up. We stopped in the summer as it eas getting just too hot and he has taken to his sleeping bag really well.( He stil isn't a great sleeper though). We also used a fan as white noise over summer as it was hot but have stopped that in the last few weeks as now too cold!! I don't think it harms them being swaddled and if it helps her to sleep then maybe just carry on till she gets herself out of the swaddle. We just used a sheet and would fold left side over left arm (arm down by side)and tuck right underneath back and then right side over right arm and all the way round his back to the front and then secure it.
RE the other issues have you looked at elizabeth plantly's sleep book she has some ideas of how to wean off feeding to sleep. Hope this helps