It certainly looks much more manageable now! Nice work!
I have styled many ponies from this particular wave. :) Did you give her hair a wash? I find that these guys are pretty simple. Usually just a quick wash with conditioner and a combing out will make their mane look much nicer. Their tail...whole other story. I can't exactly remember if it's THIS wave or the NEXT wave where their tails start to absolutely suck. I have had to de-frizz many a G4 tail over my thrifting journies. DerpyDerp910 on Youtube has a good video (https://www.youtube.com/watch?v=LUL3JfdseZY) explaining how to defrizz the hair (my method is much less glamorous. Fried Bath and Bodyworks lotion, anyone?).
I love the tinsel and always keep it, but if you want to de-tinsel, go ahead and do it! "Box Hair" is the term for the (either fun wave or) weirdly positioned hair.