You ignant. Liam has excellent sub chains off his back, guard retention, elbows from the bottom, ability to pass on top, and gnp. He has a strong ground game. Maybe you've just seen a couple clips of him murking dudes on the feet and thought that's all he must be able to do.
And Newton's doesn't really look bad on the ground either. He's just not great there. But it's unorthodox like everything else he does. Even the finish he didn't stick the hooks in, just slapped it on. He does what works well for him in general. Trying to explode out the back door serves him as a strategy because he doesn't have much neck to choke, and he's got the hips and cardio to keep scrambling out of bad positions.
That was two good fighters, and a good fight we saw tonight. Enjoy it.