I agree with ALL of the above posts, even though they disagree with one another.
Let me explain :
The design of the class insignia should be dictated by the purpose it serves, rather than just be a function of what is easiest & simplest to manufacture. If that were the overriding factor then we would all be sailing Hobie 16`s.
Since that is clearly not the case, let`s explore further.
According to my understainding, the logo / insignia serves many functions :
1) Identifies boats within the class for regatta scoring purposes.
2) Identifies members of the class, ie boats that qualify within the rules of the class.
3) Promotes the class at open regattas (create awareness)
4) Show the class as an exciting, innovative, new class.
5) Serves as a logo for one-off boats built within the class rules, that have no class of their own.

Having said that, we need to test the prospective logo designs against the criteria which which is listed above :
A simple 'F16' logo in standard font is easy, simple & cheap to make & apply to sails. Does it satisfy any of the criteria though ?
1) Yes. Although non-members can apply the same lettering to their sails & confuse race officers as to who are legitimate members of the class. (ie sail F16 compliant boats)
2) No - Anyone can make the same lettering & put it on their sails (it`s cheap & easy, remember !) Boats that don`t qualify under the rules can slap a 'F16' emblem on their sails & cause problems for those legitimate members.
3) Yes - But some 'false advertising' will take place (see points above). This will dilute the integrity of the class.
4) No.
5) Well, maybe, but I don`t think I`d like plain old lettering as my class emblem if I had a one-off built specifically for the class.

When tested against these criteria it`s easy to see that 'the simpler the better' is not always the right approach. Having said that the criteria for the logo above are as I understand them, and may differ from other peoples viewpoint entirely.
I believe that we need a stylised design that showcases our class, identifies us easily on the water and on the beach, and is exciting to look at as well, but then I`m in the design industry, and look at things a bit differently to most.
I think Wouter`s design really acchieved most of the criteria well, and suggested an exciting holding shape for it, since others were starting to put it in circular holding shapes etc, which wasn`t working. It was never meant to read the same from both sides through a clear mylar sail - if that were one of the criteria then we shoud have called the class '0Y0' or '8W8', and not 'F16' - it is quite clearly not reversible. The fact that the holding shape was unique would help to identify the logo from either side, even before the boat is close enough to read lettering.
That`s my understanding of the purpose of the logo.
But then, it might take 15 minutes longer to put on the sail.

Cheers
Steve