You could put sashing (strips of fabric) between the rows and it won't be noticable. The hodgepodge look is ok, kinda funky.
Aline

What do you plan to make from the piece once you get it all together? Sometimes you can sew strips together, row after row. Then take a rotary & cut strips from that. You can make it in a tube, then undo each section between different colors. Lay them down & sew back together. You can even have the strips different widths. You can come up with some neat combinations.

I also take paper shapes (squares & rectangles) & fill them in with scraps. I join them with strips of solid to make a large piece.

I am guessing that the blocks will develop a crooked line, and this is not what you are looking for, both suggestions may be an answer, see if pressing will give a better row, a strip of fabric used as a sashing between each row may do better, if you can get the row straight, Joan's idea of cutting into smaller blocks and re sewing sort of a checkered look could work, don't know about the glitz, I am wondering about a black border, sashing could be black too.
decisions, oh boy! Rene