Is it Royalex?
It's interesting that Wenonah has tried to address the adventure racing market.. some of who are amateurs and some of the courses rocky with a relatively bombproof and relatively narrow max widths craft in Royalex. Most dedicated (amateur and pro) racers have gone for the lighter and more slender entry lines of composites.
I have too paddled supposed low rocker Wenonahs and have the same impressions as you. Sometimes.. BUT.. the Odyssey is touted as no rocker and is a magnificent tandem expedition boat. For no advertised rocker she is a dream; highly maneuverable in class 2. (that is for an 18.5 foot long boat!) Don't try to look for it. It was discontinued a few years ago.
The Sundowner may have maneuverabilty in waves yet speed on flat. I have not paddled one.
Wenonah canoes are revered in the Midwest. I find them usually too sticky, particularly under load, but I also find that they are not as straight keeled and non rockered as they advertise. We don't see a heck of alot of them here though. It pays to grab a friend and each of you pull on a string along the bottom of the upturned potential sale canoe. There may be more curve than you expect. Yes that means go there.
Rocker is a designers convention and there is no universal measurement. Bring pencil and wood block. DY will explain it to you. I will PM both of their email addresses to you if you have further questions.
What I dislike the most about Wenonahs..and , being from New England, my experience is limited to Argosy, MN II, Odyssey, Aurora, Canak, Vagabond, Prism is, their single purpose market. In the overall scheme of things, paddler skill may be low in addressing the mass market. I do acnnowledge the racing backbground. IIn some ways Wenonah as been quite effective in tranlating the straight tracking attributes to the occasional use mass market
Also if you tend to "knee steer" canoes and use an outside heeled carved turn , I don't find most Wenonah canoes the best. Some of the seats make knee steering difficult.