One of the attractions of the middlecoin pool is the simplicity. Adding LTC as a payment option defeats the purpose of the pool. If you are going to mine LTC, do it on other LTC mining pools yourself, no need to join middlecoin.
Don't worry about it, this isn't a debate. It was simply a suggestion directed to H20 as an option, albeit one he has likely already considered to either have merit or not.
If you can't handle a few substandard payouts you should either move on or offer something constructive.