Weakling? Cassie fucked up Corrupted Shinnok. Liu Kang is child's play when it comes to Cassie
Liu Kang beat Shinnok in the old timeline too. He also beat Shao Kahn twice once in MK2 and in MK3/UMK3/MKT when Shao Kahn was powered up with all of Earth's souls (With the exception of the chosen Warriors and Kano). That means in addition to Kahn's already vast amount of souls he has consumed he was also powered with approx. an additional 6 billion plus souls if we are going by today's world population. That's insane!!! Think about that for a moment!!!!
He also beat Goro the former MK Champ and Shang Tsung 3 times who is also powered by souls and the fact that Shang was made more powerful in each game and still lost shows you that Liu Kang is a strong fighter.
So you saying Liu Kang being Child's play for Cassie is beyond a joke!!!
If NRS wanted him to still be the main protagonist in this timeline then I'm sure he also would've beaten Corrupted Shinnok. They chose Cassie to beat him instead.
I haven't even counted the things Liu Kang has done in this timeline which was mostly a rehash of what he did before. However, I personally didn't like his characterization in MK9 onwards as I thought he was a whiny baby at times. Yes, he lost to Jax in MKX and was also inadvertently killed by Raiden in MK9, that is purely because its what the writers wanted.
Could Cassie beat Liu Kang, if the writers wanted, of course, she can, but it has to be done in a way that makes sense. It should not be a walk in the park for Cassie as it will just tarnish MK's lore by just neglecting the accomplishments of Liu Kang in the past just for the sake of making the new protagonist Cassie stand out more. It's bad writing. If Cassie comes out barely alive I think it will make for an awesome story and will make it worthwhile and people will like Cassie more for it. At least in my opinion.
Let's hope MK11 does him justice and makes him a badass again.