Blame the bean counters in the Tower. It's ironic that the company are now far more attuned to such archive releases.
Are they solely to blame - I thought the band had been equally reluctant to bare some of what they considered sub-par (eg, Soulful Old Man Shunsine)
In the specific instance of "SOMS", Carl blocked it. That it was released in the year of his passing is surely significant.