Upon seeing this whilst scrolling through many many plushies, this struck me as just plain...perfect.
Compared to the ever active and 'hardcore' standard style of RD, this is absolutely adorable, and I have this insane desire to cuddle it. Down to the detail on the wings this was amazingly done.
She looks very soft, and small, which makes the work all the more amazing, as you can tell a lot of care was put into creating this. I truly think you captured Rainbow Dash's 'softer' side in this creation. The only thing I think that could use some work is her mane, while is looks good it doesn't flow as well as I think it could. Still, by far, one of the best I have seen so far. I really think you did an amazing job, and I encourage you to keep on!