I played waste-less this weekend at a small, casual (11) event and lost in T4 (got a Karakas):

4 U Sea
2 Trop
2 Bayou
10 Fetch

4 DRS
3 Strix
3 SCM
2 TNN
2 Leovold
1 Tombstalker
1 JTMS

4 Brainstorm
4 Ponder
1 Painful Truths
1 Unearth
4 FoW
1 Pierce
1 Counterspell
2 Thoughtseize
2 Hymn
3 Decay
3 Push

Sideboard
2 Flusterstorm
1 Invasive Surgery
1 Thoughtseize
1 Pithing Needle
1 Null Rod
3 Surgical
1 Marsh Casualities
1 Toxic Deluge
2 Diabolic Edict
1 Dread of Night
1 Clique

I lost to Eldrazi and Sneak/Show, which line up well to the weaknesses inherent in cutting Goyf and Wasteland. Deck was very strong in other matches (2-0'd all, none very close).
I ended up cutting the basics re: previous discussion, since Delver is typically rare at the expected meta, and it wasn't a problem. I'll probably put the Wastelands back. Unearth rotted in my hand a lot, particularly since it's almost fully dead in combo matches and miracles, etc.; it's probably out. If I played tomorrow, I'd go -1 Trop, -1 Unearth, -1 ??? (Leo, JTMS, Strix, or Ponder) for 3 Wastelands and consider trying to fit a 2nd Truths, Counterspell, and/or Tombstalker (which were all excellent). I don't want to take this too far, but the tapout vs. flash alignment of the threats/disruption is a bit mixed, and streamlining that more isn't a bad idea. Attacking with cheap threats (DRS, Delve guys) and flash threats (SCM, Clique) with a suite of SCM-enhanced counters is pretty compelling, though it makes True-Name, Leovold, Hymn, Jace, Truths harder to play. (Possibly go -2 Hymn, -1 Leo, +1 Counterspell, +1 Clique, +1 Thoughtseize). Would drop Deluge from the board for Garruk or the 2nd Leovold or Go for the Throat or something.

A point that I knew, but was still surprised by, and would re-emphasize, is that it's easy for Source/etc. folks to be Legacy nerds and over-metagame. I only saw 1 other Fatal Push and 0 other Leovolds present. This is a particularly slow-to-change meta, but it's easy to have the mindset of "Push is everywhere, so Goyf/Delver are bad, so Push is bad, so stick to Hooting Mandrils and Dismembers" and next-level your metagaming into obscurity. (On the other hand, bigger events will see an abundance of newer tech.)