I too often use the pattern as a guideline to what I want the pattern to be. I make sure there are less seams (as Rhonda K describes - I do not like making Hsts) Add or subtract borders, Change layouts, paper piece where not called for and some time modify iron directions. !! It is clearly trickier if it is a Kit but still can be done.
Why not leave you blocks as is and some how modify the border to have more length??