So you are suggesting that he's evil, but has some good effects? I wonder what could be so bad that Desolations and the Splinterings of Honor, Devotion, and Dominion are preferable alternatives.
Maybe Adonalsium WAS evil, and part of Odium's motivation for destroying other Shards is to prevent It from being reassembled.
EDIT: As per Argent's suggestion, removed spoiler. I'm not even quite sure why I put it there in the first place. Thanks for the tip!