You said "You'll also have to reduce the padding, since you have a 16Ω driver. You might be able to remove padding altogether with a 16Ω driver, but I don't think it will need that much reduction."
Would you please explain "reduce the padding"? I assume this has to do with the resistors R4s and R5s in the crossover schematics. I used an online L pad calculator. It suggested to reduce the number of resistors, given their values in the schematics, by half. I would like to be sure this is what you meant by reducing the padding.