Personally I didn't watch the entire video, forget the hate comments. I would suggest being a bit more organized and getting to the point unless there are better transitions or something else to put on the video because the attention span for most viewers are kinda bad.
Here is the thing though, I'm not going to say that I know a lot about pro play because I started watching this year but personally from what I've learned I would just say keep the core 4 and add in demon1 or inspire.
So the roster would look like:
Asuna
Eeiu
Cryo
Zander
Demon1/Inspire
The reason why I am hardvouching for this roster is mainly because I really think that Asuna is better than most tier 2 duelists including the ones you mentioned because of his experience in tier 1. Though he not consistent, there is no questioning his mechanical abilities plus the fact that he is one of the best flex players in Americas.
Not going to explain why we need Eeiu and Cryo because they are already considered world class level talent with their potential.
Zander is an absolute synergy pick along with the fact that he can frag while Igling.
Finally between demon1 and inspire I would still say demon1 is better and hear me out. I didn't like the thought of adding demon1 at first but after seeing him play in DRG as senti he's actually pretty good so it's not like we are entirely replacing one cryo with another cryo so it might be better this way. If he can't join then we can try inpire from Envy.
For headcoach I would trick or something because he is the only one who thought of keeping the core 4 but I don't think that might be possible.