Re: car seat options for a tall toddler?
Signs that your child has outgrown a seat rear facing
-> they have reached the weight limit
-> there is less than 1 inch of hard shell above their head.
Straps coming out below the child's shoulders is actually the way they're supposed to be, and not a sign that the seat needs replacing. Straps should be even with or below a child's shoulders for rear facing and even with or above for forward facing.
If she truly is outgrowing her seat, I'd recommend the First years (occasionally compass I believe) true fit. It's not too expensive and has a super high shell for tall skinny toddlers, and it FF to 65lbs as well when she gets there.