im a total noob but have always thought it to be bad pratice removing fan leaves or any healthy leaves?
but the last grow i was involved in 2 blueberry clones in soil, 600hps had 50-70% of the large fan leaves removed 3-4days before flowering and the yield from the 2 was 13oz so i really dont think it done the plants much harm???
and the bottom buds were pretty big! so im really in 2 minds now weather to remove fan leaves from my current grow, i didnt have much control of the plants that the fan leaves were removed from.