I like the idea of maindeck serenity to get advantage of hatching plans. Ichor Wellspring and Perilous Research also help with high synergy. Assuming we are getting high amounts of cards, I'd play lots of cheap spells, specially countermagic (it's a pity when you have too many cards but can't play all of them). I'd play less creatures, and I'd prefer those with flash, and zur. zur gets both sides of the *combo*, so play it, at least a couple.
Stop one moment to think about pairings.
MUD punish us if we play lots of spells, but serenity sounds good. Yes, we like serenity! Finding it easily (tutors, for example) would help.
Against oath, serenity is really good again. And oath is quite common, so sign me up with serenity.
What about control? well, i'd play lots of countermagic, and I'd play this deck similar to landstill. then control should be a good pairing.
Aggro decks? these seem the trickier. engineered explosives (bad with serenity), toxic deluge, damnation... dunno. btw, dredge also feels bad.
I know if have changed a lot of your deck (changing aggro to control), but in my eyes is the best way to take advantage of hatching plans. Ah, and give a try to abjure, it's nice with plans.
I like the idea of the decks synergy, and I too think it should be played in a control form. I am not a fan of Zur though, it has to attack to get ANY Value and commits you to a 3rd color.
I'd much rather play 4 Enlightened Tutor, and then along with the "combo" pieces, add a toolbox of situational stuff to get, Engineered Explosives, Stony Silence, Sensei's Divining Top, Counterbalance, Helm of Obedience, Rest in Peace, etc. I would also up the Swords to Plowshares to 4. I agree with having a ton of counters and playing similar to Landstill. The deck seems like a ton of fun to play and it could do well. Against Dredge, the Enlightened Tutors become golden because you have access to so many cards to grab. I wish you luck with the deck and hopefully you can try it out sometime.