I'm convinced half of the new kits were made by throwing darts at the wall while blindfolded, and Explo is one of the unfortunate few to be in that group.
As many others have said, Splash Wall is way too ink hungry to be of any use with Explo. You're left with three shots without any ink saver! Three! If you decide to use the wall to push, at least one of those shots should be saved as an escape option. Great, a sub that lets you push up with a near empty ink tank.
But wait, here's Triple Splashdown to save the day! Drop a wall, move up behind it, then you can pop the special! You know, the special that has big wind-up, no protection, and puts you in a predictable high spot that your Splash Wall doesn't cover? Yeah, that one.
There was so much potential for good Explo kits, but alas, we're stuck with this mystery of a kit.