Wow someone is intolerant of alternative builds.
If by "alternative builds" you mean "choosing all the broken lame ass abilities of your class and trying to win with them", then yes.
Except the first two builds really don't work. Snipe is fine (Assuming the Reg isn't sitting at the heal crystal), but a no tower Rook is useless early on. Yetis aren't very good while Heal is great.
Actually, literally all the Reg did the whole game was snipe. Wasn't really an issue until mid-late game where snipe no longer did all that much to my 4,000 hp+ opponents. He didn't bother trying something else, just happily kept sniping, and the enemy team kept happily absorbing them with minimal damage. Useless.
And as it stands, going yetis for Sedna or non tower spec for Rook is nonsensical. It's like refusing to take Spit as UB.
I wouldn't have a problem with alternative builds if they actually work, but when they're as effective as a Yeti's path finding... You get the idea.