Not entirely true, I run a hydreigon with 4 HP Evs, 96 atk EVs, 216 spatk EVs, and 192 speed EVs with a rash nature and holding a life orb. Draco meteor/fireblast/superpower/roost. Works wonderfully, as long as you take into account that you will be running super power, and adjust nature/evs accordingly.
Anyways, about the second team. I'll go pokemon by pokemon
Blaziken, I'm not super familiar with him because I go by smogon tiers typically, sorry :/. The set looks great though, go ahead and keep that. It seems to cover a bunch of your teams overall weaknesses to dark though, so that's nice.
Excadrill.. I'm not sure you should run excadrill without sand. It will be outrun by most of the OU metagame, and promptly OHKO'd or 2HKO'd if you're holding focus sash. I suggest maybe replacing it with a garchomp if you still want to run something with swords dance/eq. Don't want another dragon weakness? Maybe consider a more offensive gliscor with swords dance. If you want something that can rapid spin, I would highly consider donphan, it's still ground type to switch into pesky electric moves your skarmory and jellicent don't like. I would not add starmie in for a rapid spinner, as it would start to stack your weaknesses too much. (3 electric, 3 dark, 3 ghost)
Haxorus.. What do you want to make haxorus? I guess there's 2 things you can do with it. One, choice band it. Two, Dragon dance it! Be very careful of ferrothorns, as they can take its outrages and simply have haxorus kill itself. Rivalry can be risky, but pays off if it works. I wouldn't run it personally. Mold breaker is this super awesome ability that makes shedinja cry, and things like bronzong unable to switch into your earthquakes. One alternative to consider if you feel haxorus isn't pulling its weight would be a dragon dancing dragonite.
Espeon is a great pokemon with magic bounce, and I don't have a lot to say about it. Time your switches right, make the enemy taunt itself, stealth rocks itself, all that great stuff.
Skarmory! I love this pokemon. I suggest running spikes on it if you choose to run the donphan I mentioned earlier, and run stealth rock on it if you didn't! Whirlwind roost brave bird otherwise, and it will stop a good chunk of pesky dark and ghost types trying to mess with your espeon and jellicent. Possibly consider running shed shell for magnezone to make it less of a threat, you want to keep this bird alive as long as possible.
Jellicent, another one of my favorite walls. The biggest problem here, is your 2 current walls are both weak to electric. This can be coverable with a ground type that you should have replacing excadrill. I think I repeated myself a lot with the electric thing, sorry. Anyways, taunt/will-o-wisp/scald/recover is the set you'd run, right? If not, I highly advise doing so.
That's really all I can think of, I hope I helped!
