To be fair, at least some of those have been given back since then. Scatter still isn’t baseline, but we’re at least getting Binding baseline in SL (though I’d much rather than Scatter, especially since Binding doesn’t stun anymore, so you can’t even Binding -> Bursting as a 1-2 stun combo). Ice Trap came back as Tar Trap. Explosive Trap is unfortunately still gone, but it was really only useful during the glyphed knockback era (which was amazing. I’m really cross that’s only a PvP talent now). Builder/Spender is still very much present in MM, and technically present in BM (though it feels more like a pure spender rotation with a ton of regen, since you’re not really ever casting Barbed Shot just for the regen, it’s for Frenzy, Stomp, and Bestial Wrath CDR).
On the flip side, compared to the early years, traps are no longer out-of-combat-only. So that’s a thing.
Like, I get it. All of the specs have been more or less completely rebuilt since what I at least regard as their peak (generally either MoP or WoD), and SV was just straight up deleted entirely and replaced with some weird Arms/Enhancement Shaman hybrid.
I’m just talking in generalities. Most of the backlash to the pruning was because of Blizzard removing utility and niche abilities that weren’t used very often, but still occasionally. Very few people cared if they no longer had core rotational spells from other specs, unless those also served some utility purpose (ex. Frostbolt for Fire and somewhat for Arcane mages).
And at least some of those are coming back, fortunately. Eyes of the Beast is back. Maim, Incapacitating Roar, and Ursol’s Vortex are becoming affinity abilities rather than pure spec-locked abilities (though unfortunately Typhoon also got caught up in that, rather than being a separate talent), and Stampeding Roar is once against available to all druids, rather than just Feral and Guardian.
Shamans got back Tremor Totem in BfA. Demonic Circle is finally back baseline again, and curses are back, including using Recklessness and Exhaustion to ping-pong feared mobs. Spell Reflect is back baseline for warriors, as it Ignore Pain and it looked like Intervene. Cast speed slows in general are back (Curse of Tongues and Numbing Poison, which also gives rogues an enrage purge again). Paladins got back Word of Glory baseline, without even a cooldown, and got back many useful auras (Crusader being a very big one I’m glad to see, though I wish Pack had come back too, for non-mounted runbacks).
Brewmasters got back Clash (!!!), and mages got back Alter Time (even if it doesn’t resets mana or buffs and such anymore, which is probably justified) and Mirror Image. DKs appear to have gotten back Lichborne (with built-in leech, no less), baseline Death Coil, and Death Coil healing undead targets again (which is huge, self-heal CD and an otherwise missing heal for Unholy’s pet), plus Anti-Magic Zone.
Even hunters got a little bit, with Scare Beast and Eyes of the Beast coming back, and Misdirection finally being changed to work like Tricks (seriously, been like 4 expansions, W 
T F )
Personally, I’m still hoping hunters will still see a class tuning pass, like many other classes have gotten, and that that will include some additional returning abilities, like Pack (and dare I hope for it, WoD (glyphed) Cheetah). I’d also love to see Distracting Shot back, and Binding Shot swapped with Scatter Shot for MM (ie. Scatter baseline, Binding back in the talent tree, and Binding Shackles, which literally screams PvP, especially since it only affects damage to you, in the PvP talents. Maybe tied to Scatter instead of Binding, since the latter would be a talent again).