As basically an economy game, there has to be limits, otherwise there is no individual challenge. Your right Maria_Espa, you have to prioritize your choices of how you play the game. There is a little room to manoeuver and play to an individual stile but every player has to play within a limit or there would be little point in playing.
There have always been calls for the removal of trees, shrubs, rocks to allow placing of buildings and make production chains uber efficient, but again, the challenge is making the best of what we are given. Faststriker is right, the more space BB give us the more we want. What they have done is reduced the bottle neck that the old island would have faced when the new content was added. We also have level 6 production buildings and licence free production buildings to improve production performance to match the increased production needs, but again its not enough for some. And the freeing up of licences ( which in themselves were a limiting factor for the growth of the game ) now means we have less constraints on the number of buildings we can build so it is inevitable that some are looking for more space to use them.
I do concede however that it would be nice to have somewhere to show our creative side, and use all those decorations, event trophy's etc. Perhaps a separate little island with just a mayors house and a `garden space' Linked to the achievement button so friends and visitors could click and come see. I think it would be more representative of the players time in game than just a number.....But then if BB gave it to us, it would probably never be large enough