Faster transfer rates, cheaper to transfer than bitcoin, price movement seems to follow Bitcoin, and cheapest coin on Coinbase right now which in my opinion will appeal to the average person looking at Coinbase.
I think the cheaper transfer fees will appeal to those looking to get their money on the cryto market. Why not buy Litecoin, make the transfer to an exchange as Litecoin and then transfer LTC to BTC for crypto trading instead of paying the BTC fees? Am I missing something?