Quick Reminder:
Remove SHs (Giants too, since They only came cuz of Luffy) and Egghead Plot wouldn't change at all (With few Tweaks ofc)
01. Vegapunk would still be Targeted by CP-0 & Bonney would still Witness Kuma's Past
02. Lucci/Kaku would still be Defeated & Captured thanks to Stussy
03. York would still Betray Vegapunk & Kill Shaka/Pythagoras & Kizaru/Saturn would still be coming to Egghead
04. Seraphim can still be Stopped by those Bubbles (Fight was Off-Paneled anyway)
05. Vegapunk would still Plan to Escape using Vega Force & relies on Pacifista/Sea Beasts to buy him Time
06. Kizaru would still Fight & Defeat Sentomaru, forcing Vegapunk to give Orders to Pacifista himself
07. Saturn would still be Forced to show up just to stop Pacifista & Bonney would still jump on him (We get Kuma Flashback)
08. Kuma would still show up & Punch Saturn, and Devon would still get his Appearance
09. Bonney would still take control of Pacifista who Fight the Marines (Stopping Buster Call), while Kizaru/Saturn still Kill Stella
10. Kizaru would also stop Fighting cuz of his Emotional Conflict (After letting Bonney for example Punch him away), Luffy Fight wasn't needed
11. Broadcast would still Start & Saturn will be forced to Summon rest of Elders to Stop it
12. It's Source would still be the Robot & Gorosei would Fight it, while Venus disables all Pacifista & Bonney Defeats VAs
Ofc the Fights & Scenes & Drama gonna play differently, but Overall, nothing Story wise would change
SHs aren't needed in this Arc at all, nor were They the reason to Trigger any of it's Events
And it's not like They met Bonney inside the Island, and Broadcast is Worldwide so They wouldn't miss anything Vega says
... etc
All i wanna add is that Volume 106 started with Lucci as Main Villain, next volume started with York as Main Villain, followed by Kizaru & then Saturn & then Gorosei. When you start to see Gorosei struggling to do their Job, you know that it's time for a New Villain, the Villain of Volume 111