The best is for everyone to be ready to key in this, rather looking for ways to criticize and pull it down without even giving it a chance to prove itself.
The problem isn't really LN, but the general idea that Bitcoin makes a step forward towards mass adoption. Some people just can't and don't want to see Bitcoin progress and become a mainstream instrument.
After LN we'll have other implementations that people will jump on and try to talk down on it. I'm used to how everything goes and can only laugh at how desperate these attempts to tarnish Bitcoin are.
I'm sure that even when Bitcoin has surpassed gold and does everything better in all aspects, there still will be skeptics trying to talk it down. Just let it go. Some people just can't be pleased, regardless of what you show them.