The pattern you've fabricated is basically perfect, even down to the pupils. The Cute mark is awesome, the detail in it is a great touch, helps to give it added depth.
The overall anatomy is awesome! Everything proportions and scales perfectly to each other, I once tried to make a dog plushie, ended up looking like a cow O_o
The mane and tail are very nicely done, stitching lines are hidden very well, and you've given her hair just the right amount of volume too! I simply can't see anything wrong with it, maybe I'm not cut out for critiques? XD
I've been watching you for a very short time, but I've been watching other plush makers and I can easily and safely say that yours are definitely among the best I've seen. You and one other plush maker make absolutely exquisite plush and the style is nearly identical so I can't say who is better so I'm saying you're both equal and magnificent in your craft.
Her body is shaped proportionately to that of the show, making it very accurate in terms of what fans are used to. Body design and how its ut together is very well done, no messed up limbs overstuffed or stiched incorrectly, legs are the right size as is the body.
The cutie mark is flawlessly done and gorgeous in color. Her mane and tail are sewn together beautifully as well blending the colors just the right way and for the mane, layering it the way you have gives the plush a unique look over a lot of other styles where its just one color layed on there. This gives her more character and personality as well with how her ear pokes out from underneath it also.
The eyes, lovely green and tinted just right around the iris where you can see the dark green and light green contrasting well but blending together perfectly.
All in all she's a perfectly crafted plush worthy of a 10/10 rating and that isn't bias, its just she is beautifully done and you can tell she was made with care and effort. Time went into this piece, it wasn't rushed and done haphazardly. Nothing as far as I can see should be improved. Hasbro should learn a thing or two from you plushers and how to do things the right way.