But what about the political implications? Whatever Rand's motivations may be, the Seanchan are not exactly popular in the areas under his control. If he were to kneel to Tuon, he could well lose the support of those that are loyal to him.

The Aiel WO would not be all that happy about it since many are channelers and think collaring is evil. And we know that it is the work of the WO that has been keeping the Aiel with Rand. If they turn to oppose him, he will likely lose the Aiel. Especially considering how badly he has treated them in his madness.

Ituralde would go crazy as would his men. He would turn on Rand for sure. Heck, Rand's decision to betray his word to Ituralde combined with this would likely have him join the WT or something to violently oppose Rand.

Most of the rulers that follow him would think that he has submitted Tuon's authority, and reject/oppose him out of fear that he would surrender their lands to the Seanchan.

Borderlanders, with their positive view of AS would reject him utterly for siding with AS-slavery. They are already anti-Rand, this would likely destroy any chance of reconciliation.

Cadsuane says that even a simple truce for the duration of the last battle would be very unpopular. Imagine how unpopular it would be for the Dragon Reborn to kneel and submit. And that is how it would be seen, regardless of whatever secret scheme Rand might have going on.

The only way I could see this working, is if Rand kneels, and then instantly (before rumours can spread of his submission) does something to clearly and openly bind Tuon to him, showing evryone that he is not a slave of the Seanchan. Anything else would simply end up costing him too much.