If instead of upgrading the tiles make a overall upgrade to the queen strength.
With this i mean make a special upgrade optinon to the queen and is workertiles,like Have 3 different levels:
1º: the normal queen has we know it but with egg laying colldown(2sec.s or 1,5 sec.s) and less health...
One thing u could try is to put the workers in a feromone and place the feromone in the tiles, if the worker is not glitchd he will pick an egg and place somewhere near the feromon.
I used this to force my ants to spaw more worker when i m playing on insane difficultys. It realy help a lot.