How would you amend this Costa Rica itinerary?

Hi we are planning a honeymoon in Costa Rica at the end of February. We like a bit of adventure and wildlife, want to be sustainable with our choices and have a bit of a relax at the end/along the way.

Given work busyness/impending Christmas to organise and the fact it’s a honeymoon we thought we’d make life easy for ourselves and use an agent to book the trip.

This is our starting point https://www.responsibletravel.com/preview.asp?PageID=1&ProductID=14997&SiteID=100001

It’s tailor made so we can change it up as much as we like. Is there anything you think is really not worth doing or anything that’s a must do that you think we should discuss with the agents?

Edit: just to say we’ve never white water rafted before so I’m a little wary of it and probably would avoid for now