I know what you mean ... batiks are generally a tighter weave, so very little give.
................. another lure to PPing!!! Precision sizing after the final trimming!
If I know a block is a little off in sizing, I mark it with a safety pin, as a reminder when I come to joining, so I can account for that with a narrower seam width on the block side, and regular 1/4" on the sashing.