Litecoin is especially faster at handling payments than Bitcoin and is an excellent, proven complementary alternative. It's a very cheap, super-safe highway for making payments - especially when it comes to micro-transactions, like, for example, when paying for a cup of coffee. In addition, the Litecoin community is working on the implementation of all kinds of new fintech gadgets that are actually intended for Bitcoin. Litecoin is now working on the implementation of the lightning network protocol and applications for smart contracts and privacy (including confidential transactions & MimbleWimble). Litecoin is certainly light and cheap, but above all in good hands with fantastic ambitions. Litecoin has a bright future as a classic and reliable altcoin.
Addition to what you said, litecoin has good adoption unlike the other alts. Some alts might perform better than ltc price-wise but you'll realize that most businesses/casinos accept ltc but not those coins. In the end you may make more profits from the other alts but when comes to real world usage, ltc is one the good ones.