Dangersense potions only half-fixes the problem with Explosives. Sure, they might make them visible, but it fails to address the two crucial things that make Explosvies such a bad design choice.
The first of which is, as I've already explained in this thread and in other threads, is that their visibility is not why they are such a bad design choice. Sure, it doesn't help that they are frequently blended in with the terrain, but making it the most visible thing possible does not guarantee that the player will see it and have the appropriate amount of time to react to it if they are falling directly on top of it; which is the cause of a lot of deaths from it. The real bad design choice behind it is that stepping on it means you blow up without any time to react to it. My proposal would fix that without having to nerf the amount of damage it does or make them shine like christmas lights - both of which would make a mockery out of the trap without actually fixing it. Explosives will still be threatening should the player not be paying attention, but the average player has adequate time to get away from it should they accidentally activate it if they do pay attention (oh, and the player should know if they have set the trap off before it blows up too).
The second of which is that buff potions should not be a necessity for playing through the game without the risk of randomly getting curbstomped out of nowhere in an instant like what Medusa and Explosives do. Instead, they should only make tasks easier. Dangersene makes it easier to avoid traps, and is inexpensive to craft, but it should not be a necessity to for the player to have a fair chance at finding Explosives before they accidentally set them off and just die (which it only helps in doing most of the time).