Sounds like Wakanda is taking mad L's
That old "Black people must forgive their enemies" trope.
Wakandans are not built like that at all in the comics. Hell even in BP 1, T'Challa was about to murk Klaw on the spot but only stopped when Okoye told him a crowd was watching and filming him.
That has nothing to do with forgiveness imo. That was the best strategic move for Wakanda.
She proved that her side was much better during battle and burned dude to a crisp. She kills him, and like M'Baku said, they get stuck in a drawn-out war with an unknown nation so familiar with vibranium that they can create suns under water. WHILE other countries all over the world try to attack them because they know they're weak at the moment. With her knowing she doesn't have much fighting experience yet.
Killing him would have felt good but would have been stupid asf, and no competent leader would have done this.
On the other hand, she whoops him and forces him to yield, and that allows time for Wakanda to heal their wounds, step up their game and create a new potential ally if shyt turns sour when it comes to other forces. Not only can they boast a victory and moral superiority over Talokan, they can threaten them to do whatever they want because Talokan, contrarily to Wakanda everybody knows about, is scared asf to be discovered.
Shuri overall felt like the best strategist we've seen as a Black Panther (compared to T'Challa's pops, T'Challa and Killmonger)
She can't fight yet but her smarts are up there. She figured out her enemy's weakness after one battle. Her plan to attract Namor, isolate him and dry him out, while preventing his crew from bringing in reinforcements with the submarine sonic disruptor was smart asf and worked. I know some folks said it was stupid to fight dude in the water but it was key to bringing him out. He never expected that and would have never stepped out in other conditions, plus she had countermeasures prepared. When she realized she couldn't whoop him in an enclosed space she thought about bringing him in the desert immediately. The way she used the reactor from the broken ship to put him on fire was great too.
I was impressed.