because you misquoted me.

I misinterpreted what you said; regardless, it's still correct. YOu can get a guaranteed hit at the end of an enemy's roll every time if timed properly.

Whereas if you roll away from someone trying to slash

There we are at the issue again; where in your situation it's a bad lightsaber vs a good blaster player.

You only slash ONCE, AFTER they've rolled away. So you get the guaranteed hit at the end of their dodge. Then you just press block again, and laugh as they are completely helpless. Except chewbacca. Because fuck chewbacca.

The invincibility of the roll isn't a resource that blaster wielders should have.

Again, the issue. It's so, SO far from invincibility. If used PROPERLY, against a competent enemy player, it allows you to avoid 1 BAD saber hit by the enemy.