There's a good bit of complaining about the slime encounter, but I do want to point one thing out.
This is an RPG world, and she's really high level, so it actually makes sense in this context for her clothes to melt without her taking any noticable damage. There's no way the durability stat of her normal clothes can compare to her body's defence stats, after all.
Normally, this "acid that only melts clothes" thing is always odd, but at least here it is consistent with the world that was established, instead of just pure fan service.