No, it won't make any difference. Your reservation will still be dropped into the resort's system about 5 days prior to arrival. The Room Assignor will see your requests and assign your room about 3-5 days prior to checking-in.
psac is correct, you need to call back. You can request anything you want, as it's only a request anyway. I don't know why the CM was hesitant as I've always had every request noted and never questioned by the WDTC. Sometimes they'll ask why I'm requesting "an odd numbered room" at CR, for example, but they've never denied noting a request. In fact, when I last booked CR, I mentioned the odd numbered room is often requested, but I didn't request it because I was also requesting a couple of other things. The CM actually asked me if I'd like to add it because there was plenty of room left for him to do so, even with two other requests.
If you've booked a STD View and would like a view like I posted on 6/26 above, just call the WDTC and ask them to tell you what requests are in your reservation, if "high floor" (the 5th floor is the one pictured above and is the highest non-CL floor) and "Epcot View" aren't in there, ask them to add it. Make sure you don't have any other "old" requests that don't pertain. Then ask the CM to read back all your requests. I know for a fact that they can "fit" at least three requests. When you check-in, ask the CM if you have an Epcot View.
Good luck and let us know what happens