Correct about Low Pressure System. There presently remains no way for Electrode to avoid killing itself via it's attack (should you do the extra damage). This means you're always exchanging prizes with your opponent should you attack with it.
Though if Electrode was able to attach itself after an opponent's attack (Japan's FAQ for the DP3 set confirms you can do this, IIRC), then you'd at least be able to use it as a wall while you charge up something worthwhile like a Flygon. :/
Looking through the compendium shows no Secret Wonders rulings yet, so... Looks like we're waiting for the next Compendium meeting to address the rather bizarre card effects (IE: Cloyster SW has caused LOADS of confusion with how exactly to handle Pluspowers and DREs on it)