I wouldn't want this for Kaladin, because I feel like it would be such a horrible ending for his character. On the other hand, it might be really interesting. I'm starting to realize that I'm okay with stories not having happy endings. Anyways, the reason that I think it would be interesting is because it could cause the slow unraveling of Kaladin's ideals. Starting with the fourth,
"I accept that there are those I cannot protect."
As a shard, I feel that Kaladin would start to believe that with his great power, he should be able to protect everyone. After he discovered his powers, he realized that he wasn't cursed, and then he felt like every one who he wasn't able to save was his fault. If he gained even more power, he might go through this again. Every time a person died, Kaladin would start to feel even worse. As a shard, he would out live all of his friends, and feel horrible for being unable to protect them.
I'm not sure how this would affect the third Ideal, but as the intent started to get to him, I think Kaladin would stop protecting people, or even start killing them claiming to be protecting them. He would see it this way because his perspective would be warped by the intent of the shard.
Anyways, that's not even mentioning what this would do to Syl. That's why I don't want this to happen. I love Syl.