EnviableAres

Also we can think about what happened on Scadrial with preservation once he seen he was beaten. If my understanding is correctly, he willingly gave up his shard and his life to imprison ruin in the well of Ascension. Alongside Dalinar giving up honor. It's not unheard of a vessel giving up power so I don't see why Ado couldn't have willingly given up and allowed the shards to be shattered because he seen it was the better option.

Yes Hoid did pull Kaladin out of a vision but he didn't have Odiums full attention. We see that Navani can manipulate the visions Odium gives her also, Shallan manipulates the visions to show her a completely different vision than Odium shows her. Not to mention Renarin and Rlain can completely pull out and hide from Odium with the help of their spren. I don't find it so difficult to believe Hoid with the help of a Dawn Shard(existence; Special Attributes: strength, Durability and, Healing) couldn't do something similar. I think that he could have been aided by Existence to give Kaladin Strength and in part Heal his mentals to be able to stand up to Odium.