I think you'll find enough to do and leave some time to chill.
We're doing 3 nights/4 nights at Andaz Papagayo and Los Altos which is not much to me and we've been to CR twice before. If you want to hit 'everything' take a planned and guided group tour (ie Caravan. Com) and they'll drive you everywhere in 10 days. Otherwise I think your plan sounds good. We are doing 1 day adventure tour while at Andaz (ziplining, tubing, hot springs, hike to waterfalls) and at Los Altos I've booked a private guide for Manuel Antonio park and a sunset cruise (
https://www.aquaquepos.com/). We leave in 30 days, I'll let you know how they are afterwards. Both MA excursions were booked through the Chase portal. Check out activities on the portal. There's also things like horseback riding, kayaking and hikes to waterfalls.