Let's see how one operates before condemning it, no? I personally don't have the slightest clue how it's all going to work. I'll wait to see one in real life before deciding.
Go try Ripple (if you dare), they have "lightning network" called "payment channel". I used Ripple in 2013 and it's terrible and I won't use it ever again. Maybe it would be a good introduction how hard would it be to live in a centralized crypto. Problem with centralized is that you are not free, you must obey by their rules, for example bitcoin exchange website can freeze your account, block you until you get verified etc, same could happen in the centralized crypto world.
There will be other crypto-currency solutions, I didn't say that crypto-currency is dead, bitcoin is dead because technically it's heading in the wrong direction. Blockchain is the only true solution, avoid everything offchained and centralized.
I expect that the future of crypto-currency world would be in concurrent blockchains, find one that is cheapest, fastest, most secure etc, blockchain usability would dictate blockchain's crypto-currency value.
You can always try to make another fork or another altcoin if you believe that theres something else that can be done. Or you can just simply go and support Bitcoin Cash as I believe it is one of the most recognizable fork out there that could take up bitcoins place I don't say that it will but it might; or support some other fork. It depends on how all plays out. You could go and support other projects if you don't like bitcoin.
LN will bring centralization, but with centralization it will bring a lot of new features as well. SO far there is no perfect crypto out there that supports all needs.
Thing is I can't change much, nor you can. We know what are the plans for development of "main devs" of bitcoin who control its development. As software is open source we all can go and change what we don't like - sadly I don't like to start alone on new coin its easier for me to look for existing one because it will take a lot of work to get your coin to be heard out.