As someone who doesn't like the addition of Thralls, Surge Pots are just as big of a mistake.
Even now, Thralls are in this state where if you can take it and you don't, you lose out quite a bit. An example of this is at Colosseum, where Thralls do enough damage to kill 3 Javelin Colossus by themselves over a 18 minute run.
Surge Pots will function essentially the same. Whereas most questions pass with high 80s and 90s, Surge Pot passed at low 70s and would've failed under 75%, demonstrating the community's dislike for Surge Pot's design despite normally default voting yes to everything.
Untradeable or not, you either bring it or you lose DPS, which makes it exactly like Thralls, but worse.
And if Jagex forgets, there's a chance that Zahur might be able to make these potions for you en masse, so the untradeable nature means nothing.