It certainly does seem to be a crapshoot when it comes to room views at BLT, particularly with Standard and Lake view. Depending on the luck of the draw, you might have a view of virtually nothing like you had; one like mine; or even one of Magic Kingdom. We did have to "fight" for this view, though. We requested high floor, inside the C. (All our previous stays were at the CR in a Lake View room, and we really wanted a similar view at BLT.) We were originally given 4th floor, outside the C. So standing next to Columbia Harbour House, we called the BLT front desk (or whoever it is that we actually spoke to) and got moved to the 14th floor, inside the C. Perfect!
How exciting! Hope you end up with exactly the view you're hoping for! In exactly 28 weeks, I'll be checking in to BLT myself!