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.