yeah the deck in general is very good. I'm also around 70+% over about 170 matches. i certainly don't think the list is bad, per se, and it's definitely better in most metas than the thalia versions IMO. It's just not quite the 75 i would recommend.
bazaar and survival finding blue cards is good and true, but thats what lets you get away with a blue count of like 17 or 18. for actual blue decks you'd want more like 20 pitchable cards. it's not an exact science, but getting the blue count higher will make your disruption much more reliable, not to mention playing 4 missteps (that card is busted).
i really don't think one priest maindeck will not tilt the dredge matchup in game 1s. if that's the reasoning then that seems suspect. having a plan for the mirror or oath game 1 is better logic, but even then i'd rather have misstep to fight deathrites and cantrips.