I kinda don't think so. Elidibus' plan for the WoD depended on the WoD thinking that Hydaelyn is like Zodiark in that she doesn't care about the life on the Shard. Only it turns out that she does; Hydaelyn's response to finding out about the flood of Light is to go fix the problem so their world can go on living. This also means that the Ascians can still use the 1st Shard to bring about a Rejoining so Zodiark can gain more power. If Hydaelyn had let the 1st Shard get flooded with Light then that would be one less Shard the Ascians could use, which you'd think would be a good thing. The most I can bring against Hydaelyn with the whole WoD incident is that she had to be told about what was happening on the 1st Shard in the first place. On the other hand, it's been implied in interviews and other places that Hydaelyn created the Shards in the first place because she was weaker then Zodiark at the time... I can easily see her being weak enough to not have the same kind of relationship she has with the Source then with all the other Shards.
It's probably worth mentioning that flooding a Shard with light/darkness is never attributed to Hydaelyn or Zodiark. The WoD link their Shard being flooded with Light with them wining against the darkness too much. Likewise, Unukalhai links the flood of Darkness on his Shard with the overuse of Auracite (whatever that is). So it looks like flooding has more to do with what the people living on the Shard do. The flip side of this is that it looks like Hydaelyn anyway can help prevent a flood when a Shard is on the brink. Whether that is something Zodiark can do, is prevented from doing, or refuses to do is anyone's guess.