Agree... Glad is awesome but he has too many big weaknesses that makes his entire Kit (while very interesting) weak.
I Agree he needs better 2nd light.
And i would add :
An improvment of his vanished guard.. she is the shortest of the game, at least in par with others Assassins
An improvement of his range (specially on the unblocable)
And otherwise he looks fine.
But he reallyyy need this Guard buff
I say give him more options, but slow down the zone attack. Guaranteeing 20ish damage from neutral with lots of tracking (so back dodging still gets you hit) and fast enough to hit some characters before they can switch guard sides (even if they dodge) is too much.
Glad is a decent-ish character in the right hands, but it's so easy to rely on the zone as a crutch that he's become a meme for slow characters.