I also have ridiculously high arches (my standard issue boots cut into the tips of my feet and blister) and plantar fasciitis. I have spent a lot of time in orthotics. Basically I was able to wean myself of of them and into a minimalist shoe after about a year. These shoes are meant to strengthen your feet's natural support so of done properly it should be a good thing. Just take it slow and make sure your form is good, do not strike with your heel, and stretch your calves well. My calves get tight if I suddenly run a long distance without working up to it, but I no longer wear orthotics except for rucking with a heavy pack.
yeah, but "hey i'm Khan the sword king" is not normal.... the universe is being fickle... this is a thing... ignore me for a few weeks.