The Current Metagame: Junk vs Canadian Threshold

[Hanni]

This started off in The Rock thread, but I figured I'd toss it into Format Discussion instead.

With a metagame consisting of Miracles, Show and Tell decks, RUG Delver, with fewer aggro decks being played than in previous months (thanks in part to the first two mentioned decks), I'm not sure why Junk isn't seeing any play as the go to "tempo" deck.

RUG Delver is better equipped at beating fast combo decks like Storm with its free countermagic, and better equipped at beating swarm aggro like Goblins and Merfolk with its more efficient red removal options.

On the other hand, the black disruption package of Junk seems much better equipped for dealing with pure control like Miracles, slower hand dependant combo like Show and Tell, and favorable in the "tempo mirror" (Junk vs RUG).

For reference, here's a decklist for those unaware of what a Junk deck looks like:

B/g/w Deadguy Rock

Lands (23)
4 Verdant Catacombs
4 Marsh Flats
3 Bayou
3 Scrubland
1 Savannah
2 Swamp
1 Karakas
1 Horizon Canopy
4 Wasteland

Creaturues (10)
4 Tarmogoyf
4 Knight of the Reliquary
2 Tombstalker

Spells (27)
4 Inquisition of Kozilek
3 Thoughtseize
4 Hymn to Tourach
4 Sinkhole
4 Swords to Plowshares
4 Abrupt Decay
4 Vindicate

This is just a rough list I threw together. Sinkhole seems like it would be good against Show and Tell and Miracles, situationally bad against RUG Delver*, and decent to good everywhere else. I'm not defending whether the card does or does not belong, just justifying why I put it into this list. With the format slowly becoming slower over the years (playing more and more spells outside of the 1cc-2cc range), it seems like it's starting to become a well-positioned card again. However, the Sinkholes in this list could be something else instead.

*By situationally bad, I mean bad most of the times, except when you hit the opponent with discard first to prevent losing alot of tempo to something like Daze, and are capable of either manascrewing their 18 land manabase, or colorscrewing their 14 colorsource manabase.

Have I been away from Magic too long to understand the game anymore, or am I thinking in the right direction and people just haven't adapted yet?

Discuss.

EDIT: For those that disagree with Sinkhole (understandable), those slots could become 1-2 Tombstalker, 1-2 Terravore, a Forest, the 4th Thoughtseize, a couple more 1cc spot removal spells, some Dark Rituals, or whatever.