Do redstone conduit pipes prevent explosions in any way?
Yes, redstone conduit will always demand energy from engines so engines will never explode/overheat, and they themselves will never explode if they have too much energy.
I know they force energy to travel in one direction (from orange to blue?) but beyond that, what are their advantages?
They don't explode. It's like playing in a world where mob griefing is enabled versus where it is disabled. So, do you want your creepers to blow your stuff up, or not?
Besides that, they have a flat energy loss of 5%, so in most cases they are better suited to the purpose. In some cases, you'd lose more energy through them than you'd lose with conductive piping, but when you factor in needing to design the system to not explode, it is easier to just go with the redstone conduits.
Oh and it has somewhat stabilised itself. But if conduits will prevent this from re-occuring, brb crafting a bajillion.
Yeah, I usually craft them by the stack and keep a spare stack around at all times. That aside, make sure to make some redstone energy cells so you can directly control how much energy your systems are using. For example, you can set your quarries to only take 20mj/t if you want more efficiency at the cost of speed. Or you can set it to 50mj/t to make sure that they are only getting the rough-max. they can handle.