I kind of enjoy the randomness of it. Each map represents a different kind of challenge.

If it bothers you just look up your seed before you start to get an idea of what it is like. You don't need to study it to just get a glimpse and general idea.

Some people would love a giant landmass with everything. I think it would just make things harder, boats can be pretty handy... it really would depend on the layout of the biomes and their resources.