Islander
Interesting attitude towards the BN2.
I think the clue is in the name ISLANDER.
This is not a high speed high flying long distance machine, but rather a twin engine pick up truck for 'hopping' short distances over the water, plus having to contend with the most basic of landing surfaces and distances.
The 'Twin' bit is required due to the regulations appertaining to public transport operations over water, and the twin it replaced was a fabric covered biplane that although in itself was a sterling provider of service could not continue indefinitely in that role.
To this must be added its 'multi role' ability (passenger-freight-passenger) in minutes, or a combination of both.
Yes a double layer window abeam the props would have been nice (and indeed modded by some) but when the wind is buffeting across a short wet strip and a job 'has' to be done then it does what it says on the tin, and all the drivers I know had great confidence in it not to mention the fun.