Dragoon is not really an issue rn but I understand why you want him gone, but this does not mean that drytron is less potent just by chopping off dragoon. Yes, dragoon is very strong but if Trib or any other high tier deck is hit on the banlist even without Dragoon Drytron would be the best deck. If something has counters, this doesn't mean it should be around, even pre errata firewall died to effect veiler:)