I tend to agree with this.
If I'll ever manage to FRED my campaign (might start after Inf R2, now I've got university and MTW modding) it will show my ideas on technological evolution.
Basically:
Terrans
- Stronger Hulls
- Better missiles
- Mass driver weapons (strong damage on hull, weak on shields)
- Tendency to create different kinds of weapons
Vasudans
- Stronger shields
- Faster and nimbler ships
- better energy weapons
- focus on (fighter) beams (mediu, damage on shields, mild to hulls)
- Tendecy to try following the Shivan tech
Shivans
- Uber shielding, crappy hulls
- Superior power systems
- Advanced energy weapons