"Loft" Bedroom in a Rental?

[Kristin Caras]

In one unit of the duplex we're looking at there is an upstairs that leads to a bedroom, bathroom and another bedroom that is not closed off (sort of like a loft space). Essentially you have to walk through the open bedroom to get to the (only) bathroom and the other bedroom. 

It appears right now that there is a family who lives there currently and their child has the closed off room and the parents sleep in the open bedroom...it seems to work OK for them but I am concerned that down the line other renters would not consider this a second bedroom and we would have to price it as a 1 bedroom unit.

To close off the open bedroom would make a very small bedroom and make a tight hallway to the bathroom and other bedroom.

Does anyone have any experience with this type of layout? I imagine it is similar to having a rental property with a loft bedroom (less privacy). Do you think it is worth it to close off the bedroom?