We stayed in a dedicated 2BR lakeview this summer and my parents were in a LV studio next door. They weren't impressed with the studio - nothing wrong with it, just no wow factor or extra space when compared to a regular room at WL or ALK. It worked for them, but they aren't in any hurry to go back to one.
On the other hand, we all found the 2BR to be huge! With the 3rd bathroom and nice livng space, all 8 of us (5 adults, 3 toddlers) easily could have stayed there - most of my parents "non-sleeping, hotel time" was spent in the 2BR with us - and so next trip we've only booked a 2BR and forgone the studio.