The standard view (to the best of my knowledge) are the side of the wing that faces the parking lot. I read somewhere there are a couple others that have an obstructed view in the center of the wing but generally speaking they run along the entire side facing the parking lot/convention center. I could be mistaken but I think if you get your request of "close to transportation" if granted would prevent you from having a fireworks view as the tower will block any possible view of the fireworks.
Yes it is definitely possible-you will not have a grand view like in the TP view tower rooms (partially obstructed by the tower itself) but it is still pretty great. They have the wishes music avail on a channel in all contemporary rooms so you can listen while you watch. You will need to request 3rd floor all the way down by the canal for the most unobstructed view.
View attachment 196797
Our fireworks view from our standard garden wing room
We could see the end of the water pageant (like when the floats head back from WL but many were turned off at that point and no music)
View attachment 196798 Not the best picture but you get the idea.