Originally Posted by ZeroZet

That is... pretty much exactly that OP said.
BB winning gets us second 6* BB. 5* on second/third place gets us second 5*. But should lower rarity girl be in top three, her new version (5*/6*) will be higher rarity than original. Upgrade!
In the same vein, 6* in 2nd/3rd place will make her new version have worse rarity than original. Downgrade!

Because this is a "Popularity Contest Event" not the "Vote for 2-4* to be 5/6* Contest Event".People will vote based on whoever they like/want, not to make 2-4* relevant in the game. A 2-4* having a 5/6* alt is no different than a 6* having a 5/6* alt since both will be a completely different units than the original whether they get an upgraded/downgraded in their rarity or not!.

So why have a 6* get another 6* or downgrade it to 5* if there are 2-4* who could get higher rarity alt regardless of ranking you ask? Simple

Because this is a "Popularity Contest Event" not the "Vote for 2-4* to be 5/6* Contest Event".

You can't blame people for voting for their waifu(which happens to be BB, currently looking at the results), nor you can't force them to vote for someone else. Instead, you can blame Nutaku for allowing 5/6*'s to participate in the contest if your favorite 2-4* are losing.

Besides, we will get 1 new 6* and 2 new 5* regardless of who wins the contest.