I dont think the extra illustrations are necessary, I would go a little lighter on the border shadows though as now it looks like you are mapping a wall on the outside of the tower and not a border element.

Presumably doors will be going on at some point (would expect someone to be able to just walk into the main bedroom). As for the bedrooms themselves; firstly is there a reason for three bedrooms? Unless it's vital for the story then to me it seems excessive and a waste of space that could be filled with far more wondrous things; bedrooms are boring. If they are important to the story (he is one of three apprentices and he had to fight the other two to inherit the tower) then I'd personally have had the wizards room higher up (as would be common given this type of setting to show status/importance) and as far as the adventure goes the wizards room should be more important/interesting than the apprentices/guest rooms, so for the adventure you should reach them later.

Looking forward to the next step