I don't know that I totally agree. Harmony would be a good example to counter your idea. Ruin and Preservation are two intents that oppose each other, however when held in balance by Sazed he maintains Harmony. I don't know if all the other shards match up with an opposite shard or intent, but based on the limited information we have regarding the shards and Adonalsium I think that as long as balance was maintained the shards and intents coexist fine.
That being said, Sazed hinted in Alloy of Law that if his actions lean too far towards one shards intent it causes imbalance and unknown problems. Perhaps this is what happend to Adonalsium, similar to what you have proposed.