Sorry, but I really can't answer your question if removing the chicks promotes more growth on a hen. I do know though that if clumps start getting real large it often causes crowding which I think seems to reduce the size of all the plants in the clump. If I have a large clump, remove some rosettes and plant them elsewhere, they do get larger than the ones all left crowded together in a big clump. If the clump is small with only a few plants it doesn't seem to matter much.
Its really exciting that you have so much room to plant! I'm really looking forward to pictures too.
And I agree - cool avatar!
