I wouldn't be surprised if they increased its cost by 1.
Currently it's very easy, especially on attack side, to farm multiple ults per half and a ult for the bonus round.
Gekko's kit literally incentives teams to let gekko plant/defuse (wingman).
An ultimate on the bonus round, if correctly used, can really snowball in a larger lead.
A few teams have already created gameplans around farming orbs + plants to create this ult advantage for the bonus round.