I do the same thing. Either take my cuts and once rooted I'll toss the mom out just because of being too big, too much space, and uses up too much water. Or if there isn't much going on in the flower tent, wich does happen on rare occasion when I dont time things out right. I'll sometimes just go ahead and throw her into flower.
But I do enjoy the occasional cleaning out of the rooms and starting from fresh clones to grow out and shape to my desire. Small solo cups and small pots mean less watering. I always take extra cuts, wich equals too many cuts because if you just take the one that you need to keep the genetics going there is always that small chance that for some crazy reason they dont root and then you've lost her for good.
Because honestly I dont enjoy re-vegging and sometimes the plant well she dont like it neither!!
So I end up taking anywhere from 4-6 cuts off of each plant (wich can add up fast depending upon your grow situation) and then immediately put into solo cups of living soil and once they're alive and growing I for some reason become attached and dont want to kill any of them off. So I then give away the extras, keeping only one nice small plant of each and re-booting the entire grow.
Thanks for allowing me to ramble...lol!