What we're seeing so far is a very mixed bag. I know one property that got a bill for an increase from $3600 a year to $6000. Broker shopped and got it for $4000 from a better company and with a reduced deductible, which wasn't really desired. Some people are getting 30% increases on boat insurance and some are getting 5%. Many changing companies. Typical post hurricane mixed market.
Your reduced deductible doesn't sound so free when the rate is up 33%. I'd curiously ask them what it would be with your old deductible.
I know one person who claimed they switched from Boat US/Geico to directly with Geico and saved. Sounds crazy and don't know if the policies were the same plus can't be sure of their story.
I'd do some shopping and see what you find out.