Kestrel is 27.5 in wide, same as Placid's RapidFire and the Curtis Vagabond and Swift Loon. All DY designs, the Kestrel benefiting? from Bondo.
The next boats up are similarly DY designs at 28.5"-29" width. Curtis LadyBug, Nomad, DragonFly, Bell FlashFire, Merlin II and Hemlock Peregrine, SRT. Nomad, Merlin II and Peregrine are basically the same DY solo tripping design, again the latter with some Bondo, and will paddle like your Vagabond/Kestrel; a little more stable due to extra width, a little faster due to extra length.
DragonFly and FlashFire have a fair amount of rocker symmetrically located; SRT has differential rocker. DragonFly and SRT are deep enough for sustained class 2, Flash isn't.
There are a bunch of 30 inch wide boats, Mad River's Guide and Bell/Placid/Colden's WildFire the most useful of the batch. The Guide is now only available in rubber, a material best used in molding outhouses but generally an unacceptable for building portable canoes.
I have a list of currently built solo canoes. Email
charliewilson77@gmail.com for an electronic copy.
Paddling a hull with stern rocker isn't really a problem with enough stick skill. If the paddler carries the blade behind their body, the poor soul will see all sides of the lake. if the forward stroke is isolated before the knee ith a high cadence, all will be well.