Wow, that's surprisingly good
The Se/Ne thing doesn't quite fit for me, but that might be a balance issue. Each is probably more accurate the stronger the preference is.
Not to rain on the parade but, "Se: I need to see this for myself." Did I miss something, I thought the person was seeing it directly. If so, then should this not be changed to say how a Se type would respond to witnessing the matter?
You're off when it comes to Fi. Cheating is against every grain of my existence, so I would be very angry, I wouldn't want to see myself doing that.
Unless you meant imagining it. I usually imagine everything happening to me then seeing how it feels, so if that's what you meant then sure.
Again, this is due to my lack of explaining it I think. I meant that Fi bases the decision off of whether the person would take part in the activity themselves or not and feel good about it, not off of whether others would see the activity as "wrong".
For instance, you say that cheating is against every grain of your existence, right? So taking it a step further, would you ever cheat? No, and so the Fi judging function would look at this situation and say "No, I wouldn't." Ne would try to look for reasons first, unless Fi takes over because it is an extremely strongly held value - which it might in your case!
To me, most Fi judgements are based off of that; subconsciously comparing the situation to our personal beliefs and attitudes towards that situation, and going forward from there.
Also, a little disclaimer: I am not a personality typologist or anything, this is just stuff that came to my head, and I don't vouch it as professional or anything of the sort

Just seeing what others thought of my ideas

Thanks for everyone who has posted so far; if I helped you at all I am happy!
P.S. I am updating the main post with my new descriptions of Se and Ne!