I am not sure what they mean by two different room types and having the ressies linked. Do you mean that you have a 2 BR and another type of room? 2BR don't connect to anything else. You could be side-by-side, but not connecting. And there's probably a slim-to-none chance that you could be side-by-side. You'd have to have people checking out on the same day ou area checking in in those same locations.
As far as requests go, you can request things like:
~ Close to parking lot
~ Close to Beach Club ~this is a good request if you want a room with the shortest walk to SAB.
~ Close to elevator
~ Pool view
They won't put an Epcot view as a request. Very unsure if they will even put Illuminations view on there. Plus, you can only see the high fireworks so it's not like it's a completely unobstructed view.
So what's important to you? I'd limit your requests to 2 or 3 of the important ones. That includes your smoking preference. If you put too many requests, the room assignor will not have many ways to help you.
We typically will do non-smoking and one other request, if we feel like it. I have to say, we have yet to have a bad room. All the locations we have had have been great and we have been in different areas and different floors.