Many players have been taken down by a single Blightsteel hit, often with haste from Lightning Greaves or some other pair of boots, and the lesson becomes infect bad. The entire mechanic is doomed to be punished for the sins of three or four one-shot cards like this
Some argue that these consistently powerful strategies involving combo elements arent always fun to play against and may not be in the spirit of Commander, but I think setting clear expectations with your playgroup will help curb frustrations
Fast mana plus White Plume is still good enough for Vintage, which should give you an idea of its power
Ultimately, Voltron is heavily customizable, so its really up to you where you take the deck
at the beginning of its owners end steps, their life total is reduced significantly
The only trade off here was your foes would know what you had there