The question I have in mind, in particular, is this one. There are arguments being made that this question is off topic because it requires developer insight in order to have a 100% authoritative answer. Does this fall under the category of developer intent or not?
This is not developer intent.
As we have discussed before, answerability is a horrible metric for whether or not a question should be considered on-topic or not. In this case, without scouring the game code, there is no way to prove anything that those answering the question are saying, fair enough. However, this doesn't suddenly make it about developer intent. The question asks about a game mechanic, and how it works. It does not ask why it works, nor does it ask what the developer was thinking when implementing it.
Sure we can't prove anything beyond a reasonable doubt, but we can make a reasonable assessment based on experience, and the knowledge we can uncover. But that does not make it off-topic.
The question is asking : "Have Riot's developers intended for a draw to be possible?". Regardless of how it happens in the game, that's the question. That the asker made up a "Imagine if" scenario doesn't change what is asked.
So it is does fall under the category of developer intent. Unless it was intended to happen, it won't.