If you meant "is catching a kick, then sweeping your opponent's planted leg" new or radical, then no, it is not. As said by the other users, catching and sweeping isn't something new or unheard of.
But the way I'm reading your post, it seems like you're asking if it's realistic to catch a kick, then throw your own counter kick to your opponenet's head instead of sweeping? You definitely could do that, or try to. Keep in mind though that kicking high endangers your balance, and in this scenario, you're holding on to your opponent's leg which he is frantically trying to pull out of your grip. Also, high kicks are typically slower than low kicks. What that means is that if you take the extra time to take your kick high instead of low, that's more time and opportunity for your opponent to toss a counter punch, or to lean in and pull you into a clinch. I'm certainly not saying don't practice it, try it, or do it. Just pointing out some 'risks'. It's not a bad thing to do, but it's not any secret, sacred technique to be praised. Just another way to counter/attack.