There will be a lot of text below, and possibly with errors, for which I'm sorry, I'm not a native speaker. But I think this feedback will help developers better understand why so many beginners don't get to the older age and quit the game.
So, here are a huge number of ages in the game. But it is concentrated in older ages. Research tech tree, playing events and building GB is fun. There was nothing else in the game besides this in 2012, there were not even events. The first age contained the same functionality as the higher. But everything is diffirent now. A full game with all functionality is only available in top guilds at the moment. GE, GBG, live communication, GB leveling with high coefficients up to 2.0. Beginners can't get there. Why? The answer is simple. Treasury. Early ages do not produce goods in sufficient quantity for a full-fledged game.
So a beginners is forced to wander through lame guilds for years before he can apply to join a top guild. Well, this is not a blitz, you say. We have also been building our cities for years. Yes, that's right. But the problem is that the players who survived this early period didn't see the full game. And the full game is often not interesting to them. They think the quintessence of team play is to find 5 players to they take up places in GB. But those who could get to know and love FOE the way it happened with us before, don't reach the moment when they can see a full-fledged game. Messing in the sandbox bothers them earlier, and they quit.
Well, maybe it's a good idea to reduce the time for research at an early age. But I think it won't work. Why? Because the conviction is firmly rooted in this game that progress is the leveling of GB. And that you have to sit for years leveling GB before you can rise to the upper ages.
Conclusion: you see the problem, but incorrectly identify it. You think that players need to be raised to the older ages faster. While the challenge should be to give them a full gaming experience as early as possible. What do I mean? Any active, smart and passionate player could get into the top guild while in the Iron Age befor. He could stayed here for a long time, playing in an environment that fully meets his needs. This is not possible now for the points I wrote about. So reducing the research time will not help much. You need to come up with a way in which a beginners will get into a comfortable environment for him right at the start, and not later