They started making glaives because the halberd specs were silly. The trade off was no shield break. This was late 90s.
Sometime in the last few years when I was gone, they let a black axe under 6 ft break shields, but kept the ancient halberd specs. Back in the day, 6 feet or go home was how SB worked.
Then more recently, my spider sense tells me the last 18 months, glaives were streamlined to be even more useable, but still no SB.
So what is the fear? An ultralight black weapon with a big reach, 6-8 ft, that breaks shields, and can easily have a red stab tip safely put on?
Baron Caetrel Von Garren, KR, OSW, OR, OG, CC, CS
Lord Protector of The Northern Kingdoms
King of Sarum
High Priest of Torm The True, First Born of The Dragyn
Brother of The White Mantle
Knight of The Realm