I like unusual growing cannabis plants and, if I have room l, I’ll let them finish just to see what they become.
That plant is very “Grinspoon” like, where it’s actually a calyx or “beaded” flowering structure instead of the normal leaf/calyx flowering structure we’re all used to.
Foxtails, genetic or otherwise, are stacked calyxes. Knowing that the most trichome rich area on any cannabis plant is the calyx, I would have definitely kept that around until it was finished. I would probably have cloned it too.
A few nanners are easy to remove and may deter the plant from putting out more.
Let us know how it smokes.