I agree it's too early and IMO, Sloman has been getting better, but if he continues to kick low, they will block them. Rafael Septién had the same issue back in 1977 and the Rams drafted Frank Corral in 78 to replace him, but Septién figured it out.
Not sure why Kupp is returning punts, more concerned with injury, but I do believe the fumble is concerning, but the coverage has not been bad on kickoffs although they got bailed out on a penalty and the punt coverage has been solid.
I'm not big on Bonamego as a special team coach, he's been just okay, whereas Fassel IMO was elite. I do believe the Ram really like Bono's assistant Tory Woodbury and would not be shocked if a change takes place, they might just promote Woodbury to Special Teams Coordinator, but I do believe he needs more seasoning.