And this is where I fall. It's rather unfortunate, as I'd love to upgrade, but without a certain level of confidence in its durability, I either have to hold on to my Gen 2 (which continues to work fine for my needs), or be tempted from time-to-time by things like the Surface Pro.
In my opinion, a tablet device in a work environment should actually be MORE durable than a laptop, simply because of how it's used. Perhaps Apple doesn't see these as much as work devices as pleasure devices. If so, that's unfortunate, and I doubt if they're viewed as such we'll see much improvement in durability. Perhaps it's not the market they're chasing.
Just prior to the new model being released, I accidentally left my Apple Pencil in a cab. For the week leading up to the new release, I thought "why bother buying a new Apple Pencil when I'll probably buy the new unit soon." Last night, I ordered a replacement pencil.
We'll see where Apple goes with this in future versions, but superusers like me who travel frequently (not so much lately for obvious reasons) -- and who DO look at these devices as laptop replacements -- might be tempted to look at other options. If Apple hopes to retain those customers, they might reconsider their design a bit.
I do agree with most of your assessment, though.