Rucoin may come back, its just that BTC-E took it on and then threw it away.
That will never help a coin, makes people think it is dead.
BTC-e has carried RUC twice and removed it twice. Both times due to low trade volume because no one knew what RUC was and others assumed RUC was the same as RUR.
I think at this point enough people are mining RUC and I think enough people would trade in it to make it a feasible addition to an exchange.
This time they totally removed from the site, wtf they did, I hope they can reopen it.