looks neat 2 me and all... but i'd suggest b4 actualy releasing this as a mod to SERIOUSLY compare and rebalance if needed.
i've seen alot of games where people add a "super race" and some ofthem actualy went GREAT

while most kinda crashed and where either to strong or with sucky designs (designs are O.K. here sow balancing remains:) )
just noticed...
the Atlantian Capital Ship Factory text doesnt quite fit (facTORY = outa the box )
might wannalook after that...
" I have also managed to retexture some of the beam weapons, as such both the Atlantian Battleship and the Hive Ship now shoot BLUE beam weapons"
blue beams???? aint that ADVENT specialty?
since they seem a pretty powerfull race i'd add some different weapon styles
(ionic storm generators (geez what a name:P)
just a simple idea... al the gunz focussing on creating
an ionic storm that does damage..... who knows.....