Hmmm...I love using the grobag but you really need at least two which is quite costly. I only have one and it's a bit of a hassle. I'm just lucky I have a dryer.
As for movement, my dd can move around in the cot and roll but she can't stand up, which is great!
If Molly likes the fleece against her face, I think she should be old enough to have a nice fleecy lovey (like a small blankie or a polar fleece toy of some sort). Do check that though, I could be wrong!