I’ve been playing the game for some hours, and I noticed a few things

Train maintenance cost is really high, Higher then I expected it to be, None of my trains made any profit while being 75% or more filled. But i love to play with the trains, and they look quite good. but I get limited because of the non profit
Might need a bit of balacing, (but this could be just me!)

Also Trams are a free win.
I build a tramline between 2 cities, Drop 15/20 trams on it, make 2Mil profit,
Seems a bit easy way to win. I could repeat this with many tram connections all making 1mil or more profit.

I hope this feedback could be usefull in some way!