lets look at the facts:
With ages:
1. You can't bee line for weapons.
2. Makes the game looonger.
3. Its new so it must be good...right?
4. Encourages more strategy in strategy games. (that sounds really stupid when I say it out loud.)
5. Only 1-2 are real reasons and there really isn't anything this adds more than it takes away.
1. To Which weapons do you refer. I can research each of the basic weapon systems in the first age and their first upgrade.
2. For military conquest victory this is true. Not sure about the other victory conditions.
3. I'm not seeing how this could be a fact. Rebuttal for the other side "It's old so it's been tried and tested and therefore always better." I wouldn't include this in the fact list from Sherlock Holmes method.
4. I guess this is a boon.
5. What does it take away from the game?
I think the age requirement was to help prevent cross dependencies on their tech trees. Because to do Planetary invasion, I really think that the ability to colonize is an important tech. Also some logistics would be important here as well. Not to mention some zero G construction to help build these large transport ships for military use. Some life-support would be nice to include on these ships as well. Should have the basics of diplomacy to demonstrate that these people should just surrender before you. By my count that would be roughly about half of the first age before you get to the planetary invasion.
Without ages:
1. The game can play freely like before.
2. Some people might not like the irritating inconvenience of researching techs they don't want to research. Or waiting for a popup of a useless tech.
3. Not having to suffer from the minority of players trying to research harpoons and PI to fast and thinking they are galactic lords.
4. Number three is a lie to start. No one ever was able to play a purely military game with PI and weapons running around like Dread Lords ignoring everything that make this game strategic!
5. To loosely quote our founding father Benjamin Franklin "Any gaming community that would give up a little liberty to gain a little security in the tech tree will deserve neither and lose both.”
1. The game plays more like we played in Gal Civ 2.
2. This can be said of any research tree requirement.
3. ... 4. I was able to play the first by bee-lining to PI and win the game rather quickly in Gal Civ 2. Play a tiny map for yourself. Larger maps this may be true, but tiny maps not so much. Thus, 4. itself would be saying that it wouldn't matter if the age requirement was there or not.
5. What liberty are we giving up? I still have the complete freedom to MOD the game to my liking. Removal of the moddability of the tech tree would yield to loss of freedom.
Conclusion... I don't support either side, but I would like to see some more deeper arguments against the ages at the moment. Otherwise I don't think the devs will change it.