The latest factory are amphibious units.
We got a new factory for them.
More mess? More noob-traps? should it be an unlock?
I think unlock factories might be considerable, but if players use factories and have some units locked (BD) they lose Brawlers to Panthers, because Brawlers can not easily retreat from these (speed 4 compared to 3.9).
Factories without all units are harder to play and more a noob-trap than an unlocked factory.
I would even go so far to see in gunships more of a noob-trap than in planes - at least for some newbes. Why? Because if you lose planes, they make no real damage and you see that. If you lose gunships to AA, they may make a bit of damage and you make more of them.
But if you have something like +100m income, you should be able to make some storages.
If you have +200e income, you should be able to make pylons.
Unlocks are not the best of what we could do.
Advanced Radars for FFA might be usefull too.
And screamer for FFA? If you are the only one in your team, some things should be available anyway.
I would go so far to disable the unlock system by default for FFA-hosts.
If newbes try new units, they are more likely to attack and take part on FFA.