Don't know if you've considered it, but have you tried Jace, Architect of Thought over Jace, Unraveler of Secrets?

5 mana is a lot for something that has so little impact when it hits the board in modern. Architect costs one less, and is immediately impactful regardless which mode you choose.

Geist of Saint Traft and Dragonlord Ojutai are pretty decent in blue/white control. Settle the Wreckage has been great in the sideboard.

Gideon of the Trials is also good against decks like storm because of the emblem. Gideon Jura keeps you alive against aggro decks and decks like bogles.

Chainer_the_Dementia_Master

As a matter of fact, after playing around with the deck for a while I have been thinking about taking out the both Jace, Unraveler of Secrets and the two Dovin Baans (they seem to only work as draw engines that die after a few turns, for me at least) and I definitely see how Jace, Architect of Thought would work much better in this deck.

Ballzanya

Unfortunately, I usually find Geist of Saint Traft to be a bit fragile and prefer creatures with more evasion (unblockable, flying), larger bodies (at least 5 usually), or ways evade removal (manlands and indestructible). As for Dragonlord Ojutai... it looks like a much better version of Prognostic Sphinx and I'll definitly consider it, but my original plan was to swap in a couple Torrential Gearhulks and maybe some Snapcaster Mages as soon as I got my hands on a few copies of Cryptic Command. And lastly! I've already been thinking of swapping out my current planeswalkers, and all three of the abilities on Gideon of the Trials line up with what I want my deck to do!