One upgrade for the brood mother would be to place the first of multiple spiders in the hand and the others in the discard pile, so that they will show up in later hands.
Another upgrade would be to add +2/+4/etc. to spiders every time they show up in the hand but are discarded. (i.e. They are 'growing'.)

Great Update! Odd bug, though; some shapes mirror correctly, but some are just rotated 90 degrees.