I bought from bicyclebluebook, they had several different BH ebikes for sale. It looked to me like they were a clearing house for BH inventory. The listing showed a picture with the X display that came with the PW-SE and that is what I received. My assumption is that later runs of the bike had the updated motor/display. If the one you are looking at has the older display and PW motor it might have been earlier in the production run? If it is a few years old already it might be important how long ago the battery had first been powered up and at what charge it was left at. Mine came new/never assembled with the battery still in the "deep sleep" mode. When I got the bike I didn't care about PW vs PW-SE but after having it a year I think the SE version with the smaller X display is much preferable. Bicyclebluebook had a "Dutch auction" type sale for their BH bikes where the price kept getting lower - I bought mine early on at $1500 with free shipping and it got lower from there (as low as in the $900s plus shipping at the end) so in comparison $1400 doesn't seem to be that smoking of a deal especially if you have to pay shipping and particularly if it has the base PW motor and if the battery has been taken out of deep sleep by charging already. Personally I would pass on if it has the base PW motor but to be competitive with the prior bicyclebluebook price with the base PW it would at least have to be several hundred less than $1400.
FYI
I'm 5'11" with a 30" inseam, it seems to me that 6' with a 32" inseam might be OK but at the upper limit for this bike which only came in "medium" frame size.
The stock Schwalbe gravel tires are good tires but I switched to Continental Gator Skin 32c, 100+ psi tires which have puncture protection and made a noticeable improvement with reduced pedaling effort.
You're right about the cadence. the SE is supposed to be limited to 110rpm but I've had it up to an indicated 120rpm with an assist bar still on the screen so maybe assist fades out above 110? The assist speed is supposed to be limited to 20mph but an assist indication bar(s) still show at slightly higher speed of 22mph on my bike (the speedometer is accurate according to those traffic "your speed" signs. These parameters are all just programming of the firmware, I wonder if Yamaha or BH did the programming, I'd assume Yamaha. Assist doesn't have a hard stop, it fades and depending on terrain it can be difficult to tell when assist cuts out. Overall the riding feel is very natural other than some slight surging with pedal strokes in the highest assist when climbing steeper hills.