Right, I’m with you now. Yes, the urgent UX has the V4 powertrain and needs up dating to V5 that’s true.
I doubt that article is accurate because firstly, I’m not sure it will physically fit but it only needs the V5 mod to increase the power and the battery efficiency. In combination, there will be less revs, less noise, more power and much more input from the battery as the Corolla. It needs to be done soon or there’s no point before the next model.
in any case, I find mine quite nippy and 8.7 seconds is fast enough to 60.