As a new Hobie 16 owner myself, I cannot speak to the reinforcement of that area from experience. However, I have two things that may help you. First, these are competitive boats that have been around for quite a long time using a nearly unchanged hull design and construction (as I understand it) for all those years. Therefore, it would be VERY unlikely that a structural/design weakness would be found in such an obvious high-stress location at this point. Two, I have significant experience with composites and fiberglass boats and I believe I know what you may be observing. Those hairline cracks are likely occurring in the gelcoat layer only. This kind of "crazing" is very common in gelcoated fiberglass construction and is the result of only two things 95% of the time. The first would be slight flexion of the glass laminate (the meat and potatoes of the hull itself). After completely restoring two of these hulls myself, I can tell you that due to both the thickness of the laminate in that area and the actual design of that lip, there is very little flexion to worry about under normal use. Second (and most likely), the gelcoat in that area may have been applied a little too thick and consequently underwent a little too much shrinkage (like all commom resins) while curing. This leads to "hairline" cracks. It is cosmetic only and not to be worried about - especially if it is only under the lip. Gelcoat contributes nothing to the strength of your boat.
Delamination or "soft spots" as it is said, is the description used to explain the separation of the fiberglass layer from the (foam in this case) core. Much of the Hobie hull is, in-fact, a "sandwich" cored construction - laminated fiberglass over a foam core - then laminate fiberglass again on the inside. All this forms one big "cored" laminate construction. People are, unfortunately, not specific when using the term "laminate". They do not differentiate between laminated fiberglass or the more aggregate laminate of the "cored construction" as a whole. In any event, the lip of the hull is solid fiberglass laminate without any foam core. Although it is true that delamination can occur within the fiberglass layers themselves (independant of any "core"), that is not what is generally referred to in the Hobie community, and not likely what you are experiencing with your boat. So, once again you do not have to worry. The anchor bars should be fine as is.
Hope this helps