Lightning network is a game changer yes but a payment processor? not really. Don't get me wrong, I'd choose LTC over Bcash anytime but If services were willing to accept Litecoin in the past years, they would've done it already without the need of waiting for a third party service.
I believe that adoption and people "spending and topping up" coins in real-life use-case is pretty crucial for a coin to be worth something more than market speculation. A payment system actually is a significant step for LTC imo.
Similar things is going on for XLM (in the SE Asian market) hence it is rapidly growing atm too.