I was just watching a vlog from Gareth Danks about his move from an X-H1 to the Sony A7III. He was on a landscape trip but he was saying that for his corporate, paying work, the X-H1 just wasn't reliable. He had 3 bodies and all had lockup issues.
(Link if you're interested:
View: https://www.youtube.com/watch?v=djhe6wMkFKg
)
Some find Fuji's to be perfect for them, for others CaNikon, other Sony. If it's your business, then you need the most appropriate and cost effective tool to get your work done.
Will better (Eye-AF) AF give you more keepers? Will that with higher frames per second give you more RAW files to work with? Will that mean more work on culling/editing? Does high fps even matter to you?
It is about a tool for the job though. If you're not happy with the current "tool", then try another and see if things improve. Perhaps you should hire a Sony for a wedding to see if is a better tool for you.
It was only after second shooting with hired a Canon 5D2 that I decided to move to full frame Canon. Even if I had the budget, I would only switch to Sony if I could try it out properly beforehand.