slowing down from plane,the engine,on a bracket boat,will almost become submerged,that's not good...the 4 stoke engines,you need to be careful concerning the exhaust reliefs...
water in the boat,here's a good one,take a look at the way out for the water on a bracket boat...pay attention to the scupper size...if you take a good wave over the bow,where's the water gonna drain ??? out those 2 1" drains ??? gonna take a long time...ask the owner of a 265 g/w who had the very thing happen to him...the cockpit was almost completley filled,almost sank the boat...not good huh ?? i've ran notched transom boats for a long time,never once did i feel unsafe...i fish mostly off shore,tuna,marling,both trolling and chunking,as well as scallop boat fishing...never had a problem ever...
spent some time drigting and bucktailing stripers in the rips off cape may too...again,never had a problem...
it all comes down to what you as a boat owner prefer...but to make a statment that notched transom boats are unsafe,that's completley false...again,if you're happy with what you're running,then that's all that matters