Miller suing to overturn the voter intent standard (any misspellings nix a vote, and he apparently does not like cursive handwriting either) would be a frivolous lawsuit (e.g., to deviate from that would be unconstitutional), and he intends to do that apparently, and that makes him way, way out there.
It's not frivolous to sue the state to make it adhere to the letter of state law, which appears to require the person written in match the name on the list. Federal standards might overrule that, but just based on Alaska state law, he has a case.