I think that we should be able to merge more plots. By this I mean when you buy more plots, you're able to merge more. Let's say I buy one extra plot, when I do this I'd be able to merge one more plot. Same thing with three plots and nine plots. (Three plots have three more merges, nine plots have nine more merges.) I think this should be implemented because if you buy extra plots, you may do it so you have more space to build one thing. When you do this it may get frustrating because you can only merge four plots but you have many more than that.