27.5 tires, 29.5 standover height, evelo delta is too big a bike for me. How tall are you? How long are your legs (inseam)? This bike is 2.5" taller than rad mini.
Double suspension should help arthritic hands. I use foam pool floats on my handlebars for that problem. My cargo bike has no suspension but 2.1" x 26" tires smooth out everything but potholes. I see a problem with a Rad mini, 20" wheels don't smooth out bumps nearly as well as 26" IMHO.
Speaking of arthritis, shifing a 7 speed Shimano thumb shifter caused joint pain and a big cyst over my thumb joint (2" dia x .5" thick). Nuvinci has a nice twist shifter, I've been thinking of buying one. You can also buy twist shifters from suntour via niagaracycle etc. Such a twist shifter on a derailleur hub has shrunk my cyst down to 1" diameter but I have to wear gloves to make it downshift when my hands are wet. It also misses the top gear sometimes, letting the spring tension go is not enough to make the derailleur shift unless the wheels hit something uneven. The nuvinci shifter pulls both up and down with two cables, I've been thinking of buying one from the same parts house.
If you're of a certain age, at some point (age 64) I found it hard to get my foot over a top bar when mounting. Evelo has a drop frame in another model.
How steep are grades on your trails? 750 W mid drive motor, no triple front crank, I would suspect it would start having trouble about 10%. I have 15% grades on my commute. Certainly don't get beyond battery range if hills are coming up.
