Why makes you feel optimism about LTC? I think SegWit won't give something for LTC. Because I don't see anything was being special caused by SegWit soon.
realistically as an actual proposition for commerce it's far better than btc, quicker, lower fees, no shadiness, but if there's no demand then it isn't.
That's the main point how will be useless it. Even SegWit was held for increasing the bitcoin performance and fixing the block size problem.
There is no a reason give SegWit for LTC in my mind.