This is exactly why I built Surreal CMS. They don’t get to edit the entire page — only what you’ve explicitly defined. Granular control like this keeps the site looking professional. I even went so far as to remove font options (family, size, and colors) so clients can focus on content instead of design.
There’s a bit of backstory between Cushy and Surreal, so I’m very familiar with it. They haven’t changed pricing since they launched, but I wanted to experiment because users kept telling me that $25/mo (my launch price 10 years ago) was too steep.
I ended up moving to a metered pricing structure based on number of sites, but that had mixed results too. In fact, I think the only price ALL users are happy with is “free” 
Since then, I’ve had many discussions about pricing with my users. The consensus is that most don’t mind paying a recurring fee if it’s reasonable, but metered pricing (e.g. based on the number of sites or users) is almost always less attractive.
With the new version of Surreal, I’ve switched back to flat pricing and made the service free for personal, educational, and non-profit use. Paid plans start at $9/mo and are based on features, not sites.
So far, the feedback has been very positive, so I’m hoping I’ve finally hit the sweet spot! 
Please join this discussion so I can gather more feedback. I’m going to solve the sync problem in Surreal one way or another.