Looks pretty solid at an initial glance. But yeah I agree that Zekrom is pretty mediocre at the moment. At least Zekrom EX can one shot stuff like Hydreigon, so perhaps switch to the EX version? I would tend to drop one of the tynamo though. You have a super rod to recycle them as needed and I think you have enough ball power to search them out quick enough.
"Power through ambition." - Overlord Drakow Forum Set // Pair
I still play Zekrom because it's a non-EX attacker, which I feel I need. It's also very helpful in many cases in that I can hit for 120 damage reliably with less risk and/or investment than if I used Mewtwo EX. I'm trying to decide what might be a better card to use over it, but Zekrom seems solid enough to use in the deck. I had to remove two Zekrom from the list I had before, and then Mewtwo became easy to come by, thankfully. I also play four Tynamo because I don't want to worry about losing most of my Tynamo early in the game if any are prized.