The introduction of the Cohort mechanic in Oath of the Gatewatch to allies several years later didnt do much to improve my opinion
If your opponent discards a card while you control Leyline of the Void, abilities that check whether a card is discarded (such as Hollow One, or a madness ability of the discarded card) still work, even though that card never reaches that player's graveyard
Special guest cards are not made Standard legal just because they are included in newer sets
All of this disrupts the opposing player from playing their cards how they want to
There are too many incentives to play Orzhov Control, especially the cards you see on this list, to ignore
Time Spiral solves this elegantly, by making the wheel free for a tremendous advantage: a fresh hand and likely all, or at least most of your mana