Your best bet is probably to "block" the blocks. Sharon Schamber has some Youtube videos on how to do this. Basically you spray the block with water or starch, pin it to an absorbent surface, and let it dry. This may or may not work completely, but it should at least help. If you stretched the bias while sewing, those seams may not shrink.
I have been able to camouflage a lot of "wonkiness" in blocks when machine quilting on my frame. I found that using a lot of quilting helped tame the wonkiness (plus there are a few tricks machine quilters can use; for example, using soup cans or rice bags to get the blocks to lay flat enough for quilting).