1) as happens with the filds: which are randome even the planets should have randome statistics

example: at the moment there are the planets that give bonuses to the gas, others to the mineral and others to the metal.
but once identified, one already knows what they are.
What happens if the planets instead have a different system?
example of metal, mineral, vespene production base from 0 to 100 random?
every planet can give from -10% to + 10% of production bonus to all three resources in production, even this random?
example a forest planet can have a production base = 100 ore, 20 Metal, 5 Vespene
and then have -10% metal production, + 5% mineral production and + 10% Vespene production
in addition the planets that already have their +% in production maintain it

example we find a planet gass with the following random characteristics
Planet gass
Base income: Metal 10, Mineral 100, gas 20
On gas planets Vespene income is increased by 8%
Base Production Bonus: Mineral -5%, Metal + 5%, Vespene + 10%

While another gass planet will be:
Planet gass
Base income: Metal 100, Mineral 0, gas 20
On gas planets Vespene income is increased by 8%
Base Production Bonus: Mineral + 10%, Metal -5%, Vespene + 2%

In practice, all planets have two random factors
Base income and Base Production Bounus
the same as fild

a very lucky person could find an example planet
Planet gass 300 fild
Base income: Metal 100, Mineral 100, gas 100
On gas planets Vespene income is increased by 8%
Base Production Bonus: Mineral + 10%, Metal + 10%, Vespene + 10%

or maybe have used 400 colony ship to get this result
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2) use the spy not only to spy on opponents but also to probe the planets:
example, a planet not yet identified as well as being able to colonize you can identify it with a spy,
without having to pierce it colonize in order to identify it
the probe gives you the following information about the planet:
Planet: unoccupied
Diameter 7850 km
Temperatures -16 °
Type: Gas planet
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3) Terran new flagship: flagship Yamato

the yamato pearl batleship of the Umana fleet, uses the yamato cannon as the main weapon, but it is versatile having numerous weapons available, it can carry with it up to 1000 fighters (without consuming vespene)
is the most powerful flagship of the Human fleet after the star Supernova, the yamato flagship is equipped with a hangar area that allows it to carry up to 1000 fighters
with him.
prerequisites:
yamato cannon (Level: 10)
shipyard (Level: 12)
Impulse drive (Level: 12)
Hiperspace drive (Level: 12)
Weapond tecnology (Level: 12)
Armor Technology (Level: 12)
shielding tecnology (Level: 12)
Laser Tecnology (Level: 12)
Ion technology (Level: 12)
Plasma technology (Level: 12)
cost:
10 000 000
8 000 000
2 000 000
point 10,000

Abilities:
Yamato cannon

Base values
Armor 1 500 000
Armor type Heavy
size Flagship
Shield 250 000
Speed 150? 200
    Hyperspace drive
    General
    Experimental studies
Battle speed 330
Warmup time 08m 10s
Cargo Capacity 1,000,000
    Planet raider
    storekeeper
    Experimental studies
Fuel usage 4000? 3000
    Synthetic
    Raiding
    Optimization of the hyperspace drive
    Experimental studies
Damage per round 250 000
    Laser Tecnology (Level: 12)
    Ion technology (Level: 12)
    Plasma technology (Level: 12)
    Weapons technology (Level: 12)
    Battle experience
    Admiral
    Experimental studies
Attack per shot 25,000
    Laser Tecnology (Level: 12)
    Ion technology (Level: 12)
    Plasma technology (Level: 12)
    Weapons technology (Level: 12)
    Battle experience
    Admiral
    Experimental studies
Number of shots for volley 8
Period between volleys 20 seconds
Attack range 650
Blocking ability 2
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4) Toss space station:

Mothership Core (new Bilding)
the Mothership Core terraformizes the moon so that it can become a space station, it is its engine, the space station Toss has the following skills
it moves between the cordinates like an insectoid, but it can teleport, between solar systems like a Terran space station.

Psionic Cannon(new Bilding):
powered by the Mothership Core the space cannon uses special weapon technology, to radiate a planet and destroy it, like a gravitational gun.

Those seem like interesting ideas. Not sure I like the idea of a planet not producing any of a resource but seems doable.