DK is obnoxious to face in Arena

Is anything ever going to be done regarding this class in Arena? While the Hero cards being draftable is an issue in itself, none of them seem to be as big of an issue as DK (and a bit of Hunter) with Kerrigan (sporting an insane 66,6% winrate according to HSReplay).

To make matters worse, DK's Zerg package is probably the best out of all 4 classes in Arena specifically (Infestor being the biggest offender here), alongside stuff Brittlebone Buccaneer and Dreadhound Handler giving very powerful board presence for very little investment in the early game.

That's not even mentioning the absolute abomination that is Assimilating Blight. How has this card not yet been banned, or even reduced in draft appearances for overperforming in Arena is beyond me. It's currently the second highest winrate DK card (after Kerrigan, of course) and is the main culprit behind the egregious state of this class right now, since the pool of minions it can summon is saturated with VERY strong cards (Soulbound Spire, aforementioned Infestor, Escape Pod etc.) which tend to have incredible synergy with the rest of DK's draftable options.

While we are on the topic of potentially bannable cards, wasn't Horizon's Edge banned before this patch? Or do the bans expire when a new Arena rotation rolls around (I would genuinely like to know since I came back to the game after 3 years)? If that seems to be the case, this card should be banned AGAIN since it's very powerful despite the randomness factor, especially in tandem with the DK's Zerg toys.

And if you manage to somehow deal with all of DK's ridiculousness (or he draws bad), there's always Travel Security to spice up DK's already powerful midgame.

It's getting really tiring to play as or against DK almost every game past 5-6 wins due to a handful of very powerful cards at its disposal, and this is coming from someone who went 12-2 in two consecutive runs with DK.

My armchair balancing ideas would be any of the following:

  • Ban Assimilating Blight from Arena, or give it an occurence penalty

  • Make Infestor 4 mana 3/3, so it doesn't appear as an option for Assimilating Blight

  • Increase Brittlebone Buccaneer's mana cost to 3

  • Reduce Brood Queen's health to 4

  • Ban Hero cards from draft; or nerf Kerrigan's Battlecry/Hero Power (banning Hero cards in Arena would be a shame since they are fun to use, but Raynor and Artanis are overshadowed by Kerrigan)

(Note: I do not play constructed so I am not familiar with these cards' viability there, but would nevertheless like to hear opinions on these ideas, whether good or bad)

Thoughts?