I'm not really seeing this being better than Genesect.
The fact that you're sniping is pretty cool, but you're hitting for 50 less damage, and Genesect is both capable of accelerating energy onto himself with energy reload and with max elixir, and shining genesect is only a one-prize attacker for when lele destroys you with energy drive.
I LOVE alolan Exeggutor as a pokemon, but this card is just incredibly underwhelming.
Same for it not being as good as genesect but I could see this as a second option in some builds, kinda like how black kyurem was in Keldeo back in the day, if it was a second attacker that means that against gardevoir you could just not use it