After 0.19 I can do one of these. Reply with a number, and why if you like:

1.

2.

3.

Nothing is decided. The most convincing reply wins, not just the most votes.

I think you should allow the player to input a seed on world start incase they like a map and want to replay it

Great idea and easy to add: every world already comes from a seed, it's just hidden. In the next update (0.20, with the Sea Peoples) you'll see your world's seed in the menu and at the end of a game and you can type one in when you start. It's also the first step toward something I've wanted to try: a weekly challenge where everyone plays the same seed and the most glory wins. Thanks!