As much as I hate to say it, any Paladin deck with the slightest sense of flavour/fun (so not mech/murloc or whatever the fuck Blizzard is trying to push these days) is basically Tier 4, or trash (or both depending on your standards) . So no, this deck will not be able to compete, in the long term (maybe if you're lucky you might do well in a small sample space), in a high level ranked setting where Rogues run rampant.
As a long time Paladin main myself it really annoys me to see Blizzard print all these boring and flavourless Paladin mech/murloc cards in a game based on Warcraft, in which the fantasy and role-playing aspects are such a big component.
That said, if you enjoy playing the deck/are doing well, what's to stop you from piloting it? Let blizzard know you enjoy a Dragon Highlander Paladin archetype much more that others by playing it.
Deck-wise, it's probably not worth it to run Ysera and Nozdormu in this tempo oriented meta - Ysera is simply too slow and most decks can easily deal with an 8/8 with 10 mana, leaving a net tempo loss for you in most cases. I think this deck would do better with an equality / pyro combo, Scalewyrm, Acolyte/Aldor. Dragon Breeder and Dragon Speaker, while fun to use, are probably not worth running.