This is the reason that I haven't pre-ordered the game, and may well not get it at all. As much as I'm intrigued by the affinity mechanic, satellites, the new setting, and other things, it feels like a step backward, in that small and tall empires are now of questionable viability. Simply by making the number of trade routes proportional to the width of your empire instead of simply fixed, they've arbitrarily knocked out my favourite way of playing Civ and insisted I play a style that necessarily requires more spam and more micro, at least at any significant difficulty setting.
I know people will pooh pooh what I'm saying, and that's fine, people are entitled to do that, the reasons that any person might not want to play a game aren't universally applicable after all. But I'd just comment that it's very unusual for me to feel this concerned about a mechanic in new game in a franchise. Most of the time I can see some positives, even in controversial design changes. This time, I can only see negatives and I don't understand why they had to go down this path