MALGRENOL

Named after yours truly, the Malgrenol produces Startanks and Degrusers.  On that note, due to "one kind of unit at a time" issues, Startanks and hawks can no longer switch back and forth between each other.  To compensate, Startanks will be hovering units, allowing Tosonians to transform into them "on the fly."

Interesting, so it's not possible to have more than one copy of the unit at a time, unlike the others?

You can have, for example, 10 Startanks at once or 6 Hawks at once.  (The Cythid Race is the only race to have units which can only be used one copy at a time)

The reason for having to take away the viking-like switching from startanks to hawks is hard for me to explain

Oh ok so you just can't switch between units when you want to use those?

Startanks and Hawks used to be like Starcraft II vikings: They could switch from air mode (Hawk) to ground mode (Startank). 

Just like other S.A.D. units, you can switch from Hawks/Startanks to other units--even to each other--if you need to, via Tosonian versions of Operation Centers or Transformation Gateways.  But the "Viking transformation" ability is gone.