I tried Krenko in a Legacy cube for a while (2 years?), and it was a removal check for sure, because it'd tap for usually 2-3 Goblins the first time around, threatening to do much worse. When we were cubing with
Bloodline Keeper for a long time and it was about as good as the front side. It never really "went off" and by its second year was a last pick more often than not, I think I really took too long to remove it, even if I've been pushing Red as the "token" color.
In a lower-powered environment than a 720 Legacy-ish cube, I think it's interesting, but if Red is primarily an aggressive color in your list (which, yeah), it's probably going to be a bit out-of-place at best and feel contrary to what its fellow goblins are trying to do. You'd need a really specific environment, and from my testing, it's not even in the token-heavy builds.