I think it would be better if eras could last a bit longer expetially ancient and classic, it's a bit too easy to earn stars in the first part of the game.

I'd like to see maybe in one year after game realise a modification of the neolitic era,  It would be amazing to have the research tree from the beginning of the game and having to reserch  agricultur to get to the ancient era and making the agriculture research speed dipending by the number of your nomad units and the scientific interes points aldready present in the game it would deafinitly be better of hunting down 3 deers.