How downgraded the combat system is is kinda hard to determine. We can't see the button inputs for the combos, how much priority the combos give you, and we can't see the guy botch any dodges yet still have them work. We also can't really be sure about the enemy ai because that seems to be an intro stage and I can see easing into the game for the first level as being a reasonable design decision.
Basically confirmation bias if you think that that video shows that the combat has been dumbed down without doubt I think.
Not to say that isn't warranted because "Ninja Theory"
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No problem!
This is a cute and pop genocide of love!