Just to elaborate a bit, since now I'm not on my phone :)
Lix brings so much more than just BAS. For starters, that same A3 *also* reduces ally CD by one turn, which is *really really *REALLY* good*. There are so few ways to reduce cooldowns as-is, and most of those ways literally just reduce cooldowns, whereas Lix does it ontop of also doing an attack AND placing BAS. Oh - AND a 4x ATK multiplier, which is nothing to scoff at, considering she has 1500 base ATK - AS A SUPPORT BASICALLY.
But on top of that, she *also* has a triple-hit A2 which reduces TM AND places speed down.
And if that wasn't even good enough, she has one of the best passives in the game. Her passive literally lets you cheat wins out of arena fights you'd otherwise lose.
She. Is. Awesome.