Unless of course SegWit truly does suck and only time on Litecoin will tell 
SegWit has been activated on GRS for months now. It's about to activate on LTC and at least 2 other altcoins. It has already proven itself.So a few coins with very low volume and a small number of nodes needed a soft fork to increase (not capacity?), but Lightning compatbility? And this is proof of... what exactly? I think it's largely pointless, since coins the size and traffic of Litecoin can easily do hard forks.
ORLY
So what do you want then? Segwit has been proven to be safe on testnet, it has been tested along with LN too but that's another story anyway, let's focus on segwit itself. It's been on testnet for ages, it's been on several alts, not it will be on LTC too.
The next step is to be added on bitcoin, so looks like segwit haters will not become believers until they see it live in bitcoin, but block at the same time. Decide.
Segwit is dead. Even if it were safe I wouldn't run it - it's not a solution for the current problems, its backers are showing more and more sketchy behaviors, and there are too many unknowns. Bury it and move on to the next solution. How about we scale bitcoin by increasing the blocksize and quit dicking around with these overcomplicated and pointless code upgrades on altcoins?
Segwit will shine in LTC along with lightning network and LTC will go to new ATH, meanwhile BTC will stay as it is, hopefully going up too, but we'll see. Maybe people get tired and move to LTC, but I guess people that don't care about making any transactions will stick with BTC as the hodlers coin back by the network effect.
The rest of options are stupid, including blocksize increase without segwit first.
Why would anyone want to use lightening when they can do on chain transactions?