Larian puts a lot of clutter in the world (and did so in DOS1+2 IIRC). It would be nice if all that clutter (or a lot of it) was useful in some fashion. From DOS2, they already make it necessary to use a shovel to dig up dirt patches. That's good. It would also be nice if the rope was usable in the way you are talking about it. Then we have heavy objects which are great for throwing. Still, making clutter useful so you think about how you might need it could be really cool, and it's a great way of unifying design/style with gameplay. They're also going in that direction with using food (and maybe having fresh food spoil?). Has anyone tried equipping torches with characters without darkvision? That would be cool, if it's not already implemented. Off the top of my head:
-If you are skilled in performance or are a bard, you should be able to play an instrument to grab the attention of people. Could be good for party stealth.
-As you mention, having a rope or rope-and-hook item could be great for adding verticality to combat. It could also maybe use a full round action as a lasso if your dexterity or strength is high enough, allowing for long-range grappling, like
https://forgottenrealms.fandom.com/wiki/Lasso (Think Scorpion's "Get over here!")
-Not sure if there's crafting, but there's a lot of raw ingredients and empty bottles in the world... make bombs, potions, or poisons based on access to recipes? DOS2 had this IIRC.
-Lure or distract animals/monsters with bait or food?
This post was a little off-topic, but was inspired by your suggestion. At the end of the day, I hope every situation gives us an opportunity to turn our trash into treasure. To concur with some other suggestions here, giving the player many ways to engage in verticality (Portals, ropes, other spells), and giving them spells that affects movement and traversal would pair really well with varied terrain in combat encounters, to keep us from the same types of combat encounters.