I'm not sure one should arbitrarily a) regard a particular tiller (shape) as deficient based upon a photo or two b) act upon that observation.
If the bow ain't taking set, is shooting good with mild handshock and good cast, is fairly easy to find an arrow spine to fly well, then a lot of bend near the handle isn't necessarily a bad thing. One simply needs to explore his objectives, alternatives and then come to a design decision, in as much as his stave will let him pursue it. And where this is conflict, the stave always wins. But in this case, I didn't read anything that said the first tiller was in any way flawed, other than the look of it. Not saying that shape is necessarily optimum in most cases, rather that it's not necessarily flawed either.