Rust and a few claws on leaves, thick dark green leaves

Burning from feeding too much or too often (or both). If you are not feeding, then yes, your soil is too rich. If this is the case, you could ignore it and she will eventually start "consuming" the nutrients back to a non-burning level, but whatever you do, do not fertilize it for a few weeks yet. You will have to put up with burned leaves though and your plant will not like it as first preference, but will still grow.