I am perfectly capable of dealing with Winni ATONs but, I would love to see NH adopt a better marking system.
The witches (and other similar hazards that are not near shore) could be easily surrounded by standard hazard markers that would be far easier to see. Bright orange on white is much more visible than red over white or black over white, and the current marker diameter is too small.
Standard underwater hazard markers:
Hazards near shore could be marked with these:
Which everyone (that boats outside of NH...) knows means don't pass between marker and shore.
Channels like the 6 pack and Graveyard should stay marked as-is, but I would live to see the number of marked channels expanded to include areas like north and west of Dow Island. The spars there practically mark a channel now, why not just make it official so there's no possibility of thinking the proper thing to do is go around the markers rather than through them?