I've been thinking about your reply, I remember playing Monkey Island and other such games (really nice games) but I must say I can't remember how the bit about moving around went.
Lately, I've been playing Pillars of Eternity 2 (you must have heard of it?) and seeing how their system works gave me an idea for your game;
Basically, all you do is provide a shortcut key, (in Pillars of Eternity it's TAB). When the player presses that key, all possible interactibles become highlighted. The lootables, the "information", and the exits to the scene, everything. As long as you hold down the key.
They all dissapear back to normal as soon as you let go the key.
It solves the problem without making those who prefer to play without that feature frustrated, since all they need to do is not use the key. I find it really useful in the games where this feature exists.
Anyway, my 2 cents, I'd really find it useful in Willy D's