Work from home (at least for me) is a very isolating, even for an introvert; I don't do well on phones either and this is more-or-less a glorified call center job
CEO is difficult to work with, nit-picks every single mistake, and all he cares about you doing is being on the phone (you technically have other assignments but you can only do them outside regular work hours which are reserved exclusively for making calls...so goodbye work-life balance, your work is your life and vice versa). Also, during my interview, he spent a significant amount of time bashing my predecessor's performance which should have been a sign to avoid this job.
Minimal flexibility: you have to adjust your work hours to coincide with ET zone, so if you agree to work 10am-6pm, you're actually agreeing to work 7am-3pm if you're PT for example. Limited sick days too, so even if you get seriously sick you'll likely still have to work sick if you don't want to use them all up on one bout of illness. All in all, you feel like you're a prisoner in your own home.