You seem like a really really strong player to me, and although I don’t feel I’m good enough to give advice, here’s… my advice!
At 1:49, the opponent was getting up and you stood before him trying to grab him. That seemed really risky to me. I noticed you did that successfully elsewhere though, but still, quite a risk to take! Maybe try to bait something out from the opponent before coming in and grabbing would be my suggestion.
I didn’t see you backdash too often, maybe incorporate that in your plans (even sometimes to follow with a shadow blade demon and catch the opponent off guard).
From the matches I saw, I didn’t see you try any counter breakers. Maybe add that sometimes, after getting some heavies broken, which you can then use to bait a combo breaker attempt.
When the opponent has failed to break your combo, and you’re launching a shadow linker that will lead you to the end of your combo (because the opponent’s “freeze” is going to stop soon), it might be better not to use a heavy autodouble (like at 25:00), but rather a light autodouble, which will be harder to break, but still will add damage.
You grabbed Glacius out of his morph at 25:36! That’s crazy! I don’t know how you did that.