Re: Keel shape and pointing
If the helmsman is spending a lot of time pinching and "trying" to point, he could just be disrupting the flow over the keel and ultimately hurting your ability hold a lane. The other thing to consider is how flat you are sailing the boat. It sounds like you are sailing shorthanded, which means you probably don't have a lot of weight on the rail, which means you are likely heeling more than other boats. The less flat you are sailing, the more you are going to go sideways, and go sideways quickly.
The other thing is, you really should not be trying to compare how you point to the bots you mentioned. Those are all well developed one design and or performance classes, with a lot of time spent by sail makers to get a shape ideally suited to making that particular boat point. Even that Santana 20 has a cult following and therefor time spent by sail makers optimizing shapes.
My advice would be to focus on sailing the boat fast and working on crew work and boat handling , and not so much on pointing. Sail fast, sail in pressure, and make fewer mistakes than the next guy. Your boats ability to point or not point as well as the one next to you is already factored into your handicap. The fact that you have one person doing 4 jobs is not.