Boxing & unboxing is the process of converting a primitive value into an object oriented wrapper class (boxing), or converting a value from an object oriented wrapper class back to the primitive value (unboxing).
The Old Dalaran will stay in Northrend, so yes, mages are going to have 2 portals to dalaran (one to Northrend and one to the Broken Isles)
Loch Doon. Loch Doon is situated about 3 miles east of the town of Dalmellington, 18 miles east of Ayr. The car park, as seen below, is just over 1 mile east of Dalmellington next to the road signed A713 to Castle Douglas & Dumfries.