I have no issue with the inventory system as is, but I understand the complaints. Some people want a different system so they can carry more stuff, wear more gear, or just have gear on a paper doll or dedicated slots. I have a feeling they'll tweak this as development continues.

I think the boat interface itself is fine and I'm perfectly happy that you can't see the health bar of the boat. I actually think we should not have health bars for enemies, or anything that isn't you, but that's a personal preference. I'd rather see other visuals, like we have for building pieces that are water damaged or damage to the boat, to show how damaged enemies or other items are. Heck, I don't even like the alert icons over the enemies, I preferred the look of game before they added them. I wish they'd remove the steering wheel icon from the boat, too. Icons and health bars impact the immersion, and they're not really necessary anyway. The boat doesn't need a health bar. You can't do anything about it when you're on the water anyway, and you should be doing repairs on the shore frequently.

Hold fast - yeah. That could use a tweak or two.

Terraforming is fine. Don't do it excessively and it won't be a problem. If you insist on terraforming large areas then it was your decision to waste your time in that manner.