So I've looked through the literature and I found a review article saying all of this and more. It was written by a group of respected physicians from American and French hospitals and it clearly supported the widely held belief that you should drink two to three litres of water a day.
This is a common occurrence to have your brood chamber become honey bound during the main nectar flow. A typical hive body will have a brood cluster in the middle and the outside frames will contain honey. A honey bound hive happens when brood begins to emerge, it is replaced with nectar.
The downside is that an eight-frame hive will need to be taller than a comparable 10-frame hive due to the smaller cavity space created by the eight-frame box. This can provide an additional challenge in years when there is a strong honey flow and the supers are stacked up like a skyscraper requiring use of a ladder to reach the top.