It wasn't one that came up often as far as I'm aware, because of the pay to win vibe.
It's tremendously exploitable and ruins a core tenet of the game: that decisions and actions have consequences, and that those consequences are often traceable through history.
part of that tenet has changed though, CCP has revisited skills and mechanics in such ways as to make some skills irrelevant, or required to have at 5 to make a difference.
For example, when they changed reprocessing you could melt loot with above average refining skills (scrapmetal at 1), now that doesnt cut it ...you need it at 5 to make it useful....in other areas, tractor beams required the science graviton physics skill....now it doesn'nt....
Having SP just sitting there, regardless if you no longer pay for clones, is a waste.
With this feature you can adjust your character a bit, and make the unused SP useful to others....however the only concern i have is this will make tracking spy alts impossible.....you can always discard a "burn" name and then just create a fully skilled toon right from the get go.