Hi Aantonis,
Firstly there is no chance for cell reversal. Discharging like this is not as drastic as deadshorting. I don't know of any long term studies on this but i don't think there is much difference in lifetime performance between equalising all the way or not at all, but individual sets of cells can do strange things. I am doing this with my new cells (only three cycles on them so far) I'll let you know how they work out over time.
Chris