You should perfect it, and not just in power and speed, but tactically. Footwork is a huge proprietor here. Learning to "springboard" your 1,2 off your kick or knee is crazy useful. And it shocks people how explosive or fast you can explode after a strike that's supposed to be a bit slower traditionally on the recovery. That's to say you should have other tools, the threat of the others will make the 1,2 viable.
Its basically my best tools as well outside of clinching. Funny thing is, it got pretty good because I'd usually injure my legs or shoulder, so when after class when I still wanted to practice, it was just the 1,2 on the bag. I knew I've gotten better at it, but didn't realize how good it got just from doing that day in day out for a couple of years.
