A lot of people hate the colossus but I don`t think it's as bad as everyone makes out.
The original colossus took too long to build. 20 years is far too long to build a ship like that. However the colossus was built in secret and no doubt required a lot of research. Neither the Terrans or Vasudans had ever built a ship that large. It's a reasonable bet that it needed a new kind of reactor or jump engine. If one of these couldn`t be built using present technology it is posssible that the colossus project got delayed for 5 or even 10 years while the problem was sorted (thereby accounting for the colossus' ridiculous build time).
Although ineffective against shivan juggernauts the colossus is a powerful ship. Remember that the colossus and it's battlegroup broke the back of the NTF in a very short amount of time (something the GTVA had failed to do for 18 months).
Secondly the colossus is a powerful figurehead regardless of it's military might. Rebels would surrender rather than face it. Friendly ships would rally round it if a battle went badly.
Whether the GTVA would build another depends on the build time. Compare the colossus with the equivalent power in destroyers. Suppose the colossus is as powerful as 3 destroyers (haven't tested it yet. ) then if it longer to build than 3 destroyers it isn`t worth it (building 3 destroyers gives you more options, you can split them up or send them in as a task force).
If the colossus can be built in the same time as the equivalent power in destroyers the GTVA would probably build one. Even though less flexable than a group of destroyers the morale boost and political value would make it worth building.
If the colossus can be build in less time than the equivalent then the GTVA would probably commission 2 or 3 (so as to not have all their eggs in one basket).
The last option is that there is already a second half built colossus. The GTVA might have decided to build more than one anyway. Even if the colossus is less powerful than expected it's probably worth a year or two's work to finish it rather than go to the effort of junking it.
Anyway. Enough of defending everyones favourite punchbag. I'll let the flamers have their turn
