TCW and related/subsequent material never happened:
Sidious v Maul/Dooku-tier gap is considered substantially smaller by most of the reasonable people. By proxy, Windu becomes less insane in his power compared to Maul, Dooku, etc.
Disney never bought Lucasfilms and instituted the Legends policy:
Nothing changes.
No SF Malak quote:
Nobody in their right mind puts Malak as even being a good fight for Kun. Kun remains considered an equal to lower top tier, like Revan, early Anakin, etc.
No Sidious supremacy quotes:
Gid never appears in KMC at all, Sidious rises to supremacy exponentially slower, Valkorion is considered his near-equal among the darksiders by most of the forums.
No successively more powerful Banite scaling quotes:
Tenebrous remains in trash compactor, Azronger never happens.
The Bane trilogy was never written:
Nothing
if we take RPG stats to be serious representations of character power per Chee:
Utter chaos.
Registered: Jun 2016
Location: The Throne of the Sheevites
If the Bane trilogy is never written, then pre-retcon Bane would never be retconned, and he'd probably be the 2nd most powerful Force user ever without question.