FoM - Big 5 or Big 6 ?

So lately I was thinking whether the big 5 should be changed into the big 6, meaning that the 6th place would also be prequalified for the following edition. But this would also mean, that the wildcard battle wouldn't take place anymore, as we'd have 27 countries in the grand final otherwise.
So should it stay how it is or should the big 6 be introduced ? Vote in the poll !