Opinion: New LB > Old LB
Same people may not have realized it yet, but new LB doesn't have to rush gunblade anymore. You can rush ludens and kill fools like nobody's business all the same. Old LB also felt a bit more toxic. Just because you could 100-0 someone instantly with W-Q-RQ-E, distortion back. I like that it takes time now. As a mid laner, I like the new leblanc. I especially like how there's more skill involved and more reward for it. Specifically, landing chains. Rather than doing a ton of dmg by auto pressing Q-W, you have to land chains to kill people. And the damage is more rewarding if you do land chains.
I think both would be just as good. But I think the current leblanc is more fun and less toxic than the old one.