If you're not working on that particular aspect, then no - the minutiae of the building layout and surveillance video analysis won't help you identify someone. But some of us are working on that aspect, and exploring/eliminating scenarios based on that info. There is a possibility people can be identified or eliminated based on the minutiae of exploring the building layout to compare it to the video evidence. For a start, we're trying to help clarify for others such details as:
• why it's unlikely there are multiple SPs
• why it's unlikely the murder was captured by surveillance cameras despite occurring directly under them
• how SP may have (but didn't necessarily have) prior knowledge of the camera locations
• why it's unlikely SP disabled the camera(s)
• what LE's mention of "struggle" and "clean-up" might mean in context of the building layout vs any knowledge of a time window.
All of these details seem completely unimportant, but they can lead toward or away from specific persons of interest. We can determine if they acted alone, whether they were unconcerned about being identified by the cameras, if they may have had knowledge of a time window, if they felt evidence could link them to the crime, etc.
Yes, LE probably has all of that. But if we're just going to dismiss any explorations here by saying "LE has it all in hand", why have a WS forum to discuss such things? And further, if you believe LE has it all in hand and WSer's contributions aren't really worth posting, why come here at all?