Thanks for this revert...Though My suggestion previously, if consider would have landed the game in a better sweet spot. You could have just Made the final evo cell, something "temporary".
To explain further, this final cell comes filled up, when the armor evolves..and stays there for 30 secs or a minute(whichsoever better). After duration up, the cell becomes empty and can "only be filled by eliminating a squad". This will give the players who engage an extra "buff" after the elimination of the squad.
Please do consider this.. For it will encourage both aggressive yet patient play.