The Classic Back door bag does have the mentioned, and needed, cinch straps and is about 1/3 lighter than the Convertible Carry-on which might make a difference on a flight that has weight limits; I have owned both but gave the Convertible carry-on away and have used the Classic maybe 30 times over the years.
The front pockets just added bulk and thickness to the bag that I didn't need.
In the winter the Classic holds all I need, well that and a small personal item and in the summer sometimes its a bit much; but I dont pride myself on how light I pack, but I do pride myself in packing what i know will add to the enjoyment of the trip.
My style has changed a bit and I am about to purchase a hard shell carry-on bag (Shopping Walmart and Target this week .. I dont get the deal with name brands ... I have discount store cheapies that have lasted decades).
I think the hard shell will work better for me as I dont need any outside pockets and I do carry things that might get crushed from time to time.
Together with a small cross body pouch for passport and $$$ (and everything else on my body before I go through security), and from time to time a $30 Amazon under-seat bag ("personal item") that slips over the handle of a typical carry-on will take care of any potential packing needs; but I do like the Classic bag.