Why is it even such a big deal? Now you just use a Q at the end of the combo, changing the timing like that wouldn't do anything meaningful.
Also, you're saying you'd rather the damage be shifted to a point-and-click, or a large AoE fast dash? Then you'd complain even more because those spells are 50x easier to use than LB's chain.
You have to stay in range (people exaggerate big time on the leniency of the chain), and hit a narrow skillshot. You can flash once she starts her combo. You can't flash if Lux initiates with Q, and most typical mids have either a form of hard CC, or can just burst in one rotation before you can react.
They're already gutting her W damage next patch, so now you want her passive and E nerfed in addition to that?
Why not just revert her completely at this point?
https://s21.postimg.org/b8pe1ay93/face_pressed_up_to_the_glass.jpg