That enclosed cockpit provides an additional room on the boat with a 360 degree view - and because you are centered on the boat you have a much better sight line to all corners -
Many trade offs here and each boat handles it differently
As my wife and i look at boats in the 42 ft range the option of getting a center cockpit boat is more readily available so I have tried doing some do dilligence and travel in a few.
Agree on the better 360 view, only because you are higer though....disagree on the sight line to all corners, the bow yes, you are closer, but in an aft cockpit you are at the stern and closer therefore you also have a better sight line of the stern too,
The volume of room for a large large aft cabin is undeniable and a nice feature. Because we will only cruise to the Carribean and will not be at sea for extreme long trips, this feature is appealing to have a nice aft cabin with headroom. However for a blue water cruising boat spending a lot of time at sea, this would be less desirable IMHO and something where there would be seaberths more appropriate.
One place that gets sacrificed in center cockpit boats I have noticed is the galley and the salon space. Some of ther center cockpit boats have straight line galleys and some even located in the area leading back to the aft stateroom. I prefer a U shape or L shape galley you can safely work in under way. generally salon space on the center cockpit boats is 1/4 less than aft cockpit boats. Since this is where I spend most of my time below when awake this enters into the decision also.
In terms of seward motion I am having a difficult time understanding how being up higher in a center cockpit boat creates less side to side motion than being lower in an aft cockpit boat. being closer to the centerline of the fore to aft motion yes, I get that part, being higher can not be less motion for the side to side motion. Seems like a tradeoff.
In the boats I have traveled on I found the lower freeboard of the aft cockpit seemed to have an easier seaward motion than the pitching of the center cockpit in most conditions. Also the angle of heel as you got to 12 degrees seemed to exaggerate the motion on a center cockpit boat more than an aft cockpt boat. It may have just been the boats I was on, but the exagerated height of the boom off the water thus the wind pressure at a higher point made the sailing characteristics less efficient than on an aft cockpit boat with the main and boom closer to the water. The main sail covered more of the area from the mast head to the base of the mast thus spreading the loads lower on the boat. This was more noticeable to me in gust situations. Many of the center cockpit boats also had less sail area as the booms were substantially shorter than aft cockpit boats which seemed to have stronger sail plans.
In terms of spray...I found the center cockpit boats actually more susceptable as you were way closer to the bow. On a 40 ft CC you are 22 feet from the bow as opposed to 38ft on and aft cockpit. In additon the windage that a fully protected center cockpit cabin has has is far greater than a streamline aft cockpit presents. Its also easier to see the mainsail shape/ masthead on an aft cockit boat both with dodgers. On the CC you are almost blind to the main unless you stick your head out the back from under the dodger. Also you tend to have greater difficulty seeing under the jib on a CC leaving you with a much larger blind spot on your bow quarter. I found this somewhat disconcerting when approaching crab pot infesteed areas on the Chesapeake close hauled. It was difficult seeing behind the jib. This decreased visability under way may be what eventually decides it for me. Using a jib with a high cut clue could allieviate this of course.
Deck room the centercockpit has a greater amount of usable space behand the cockpit which is fun for stoage, hanging out and many options. Aft cockpit however have greater space foward of the dodger area. Aft cockpit boats have easier access to the main sail and boom. Afft cockpit seems easier to egress also. Drainage is better on Aft cockpit in general. Less steps into the salon.
Engine compartments on center cockpits seem to have better acccess except where on the aft cockpits the engines are located below the soles.
For us each boat is different. I love the rear berths of the CC, whether it is worth the tradeoff in other areas I am not sure. My wife and I need a nice berth, walk around may not be what we need. We like the rear platform of the CC. Sea motion seems to be a toss up. Sail plan favors the aft cockpit as does visability under sail.
There is no completely perfect boat and some of the decision on center vs aft depends on personal preferences as well as the type of sailing/ cruising you will do.