Decks that run Tombstalker do so because they can tap out every turn and not care due to running stuff like daze, fow, and snuff out. We dont have that same luxury. Im curious if you find that Tombstalker is better than Snapcaster in a SFM-Jace shell. On paper, i dont see the advantages. Snapcaster 's value increases greatly when running proactive stuff like thoughtseize and inq of kozilek.
I agree on tapping out, and these were essentially the tempo cards I was referring to.

rchinnock- Hope I havent messed you up with my suggestions. To be clear I am confident that an esper america TEMPO shell would be strong with approximately 11-13 threats (stalkers, SFM, delvers for example) along with the aformentioned tempo cards.

Conversely esper stoneblade is very strong eschewing the tempo plan for a lategame with bombs like jace, entreat and CA via SCM, souls, SFM, terminus and so on. I do not think a mixture of these two strategies will be as strong as either individual strategy though, which is currently where your builds are residing IMO.

I really like the idea of EE maindeck right now since it answers everything barring plainswalkers for the most, which vindicate can do either main or from the board.

I will say this, tombstalker is very well positioned right now IME. As you stated it trumps burn, all of tempo thresh barring postboard submerge and races maverick easily if protected. Stoneblades removal can be a problem with SCM but pinpoint discard + countermagic really improves this and stalkers clock is really only 3 turns to find an answer or lose. Tombstalker also laughs at counterbalance which is becoming more and more relevant. I switched from tempo thresh back to TA mainly for tombstalkers discard and blacks sideboard power and I havent looked back.

So anyway if what you got is working then by all means keep it, rogue decks are fucking cool. If not then I would suggest focusing more on one strategy or the other.