i didnt say its all about the algorithm but flattening GPU/CPU performance is quite a big deal
on the other hand i could say by your reasons LTC should be worthless..
Litecoin had some advantages...attractive to people wh have "missed the start" and at that time the confirmation blocks.
Both things are worthless now but ltc has achieved some popularity and a strong community to support the coin. And , unlike it's clone it is used for buying/selling stuff.
Mining has nothing to do with usage of a coin. Normal people don't care about how the coins are created , but about their use and value.
how do you determine the value of a coin?
centralization of mining due to huge pooling or asic development are quite troubles for bitcoin atm..
what kind of stuff impact the value what means "ease to use"?
let's admit... it's a pain the ass to get bitcoin secure them spend them
for the average internet user who googles youtube and facebook instead of typing the address ... there is the need for a new wallet new interface etc...
the average internetuser is not ready yet for shure
its a matter of time, cryptocurrencies are just at the beginning