I'm glad you are enjoying various aspects of your cruise despite the disappointment with regards excursions.
Being West Australian I have been to Broome and Darwin a few times and did a 7 day Kimberley for the first time last year on True North a 36 pax boat with a helicopter. It was amazing and the Pursuit cruise will go to some places we didn't. We will also did True North on a Neap tide which is a moderate tide so not much movement whereas our Pursuit cruise has a much higher tide which might give more dramatic effect at places like Horizontal Falls and Montgomery Reef.
For those interested in experiencing Horizontal Falls you should be aware of this upcoming ban in 2026 for boats.
https://www.watoday.com.au/politics/western-australia/state-swings-axe-on-iconic-kimberley-horizontal-falls-experience-20240315-p5fcsu.html
In case it is behind a paywall the relevant part is this:
"The West Australian government will ban boats from traversing the iconic Horizontal Falls on the Kimberley coast.
The ban will come into effect for all tour operators from 2026, except for Seaplane Adventures which will be allowed to continue the tour until 2028 when its licence expires."