I would much prefer they reinforce the already existing but underutilized nether ability for adjacency through dimensional manipulation: The same thing that allows for teleportation devices to work and for floating eyes to effect you and for necromancers and masters to use their abilities.
KA101’s problem seems based around the fact that currently that justification is rare enough that it doesn’t feel genuine - the best solution to that, in my opinion, would be to introduce more creatures that make use of it, allowing for more vectors to deliver rationalizations and lore regarding it (these things would definitely be easier to study than the eyes and the super zombies, making good lab notes describing the result a lot easier to write and come by) and opens up a lot of possibility for future monster powers expansion in the future. We could even tie this in to a justification for the result of shocker zombies, something I know still annoys some people - they collapse the distance between them and their targets, which is how they guide the lightning to hit what they want. They use the same “nether touch” effect (though to a far less significant extreme) to simply make the path to the player the path of least resistance.
I definitely see these creatures as a Nether critter rather than a triffid or fungal, and I think expanding on this ability (specifically, as a rare nether ability, not something possessed by the more mundane things in the game, of which the fungals and triffids and more common zombies are) would be a boon for future innovation.