I really like that Trek Pure for an ebike build - It's a beautiful, beautiful build. REALLY nice the way the battery sits down in that huge triangle.
I'm a sucker for a good crank-forward ebike. They are terrible aerodynamically, but I love the huge size and the upright riding position. It gives you the ability to look motorists in the eye and challenge them if they start getting impatient and pushy - and believe me, I do.
In almost every other way (besides aerodynamics), a crank-forward bike is a great choice for electrification. The Bafang mid-drives seem to me to be one of the "cleanest" setups I've ever seen. I have a Raleigh Cadent i8 I want to try one on sometime.
Now I gotta ask you about those tires. They look great for cushioning and shock absorption and I'm loving that smooth tread. They ought to make that Pure ride like a flying carpet. But after you wear those tires out, you gotta try something from Schwalbe. I gained 2-3mph when I switched from the stock tire that came on the bike to Schwalbe Marathons. Big plus with the marathons is that if you're riding on good, smooth road surfaces, you can jack up the air pressure as far as 110psi, that's their max pressure rating. I've run them at 60-80psi on smooth roads and once again got another mph or so. For my very long commute, they have been a godsend.