I think you should keep going, finish the quilt and believe that it will meld once it is all put together and quilted. I find that while my blocks may look discordant and choppy and not at all what I had in mind, the quilting, particularly if you do a fairly dense free motion, will make all the difference. And if it doesn't, I just wash the finished thing a whole lot, and it eventually fades and runs together to be quite nice. J/K (sort of) with that last bit.
RST