So many good points to comment on! Where do I start?
Yep, I agree that parking played an important factor in the first down scaling of the Poly DVC. Recall that they considered expanding on the west side (around Luau Cove) and building into the parking lot on the east side (near TTC). However, the most recent information suggests they are rushing the Poly DVC. 1 bedroom and 2 bedroom villas are popular among DVC members. However, these lengthen the conversion process. That they are going only with studios suggests they are accelerating the Poly DVC construction to fill an inventory gap they anticipate once VGF sells out. VGF is small and its inventory is going to be gone relatively soon. I'm sure Disney doesn't want a lot of DVC guides standing around with nothing to sell.
Typical for WDW in recent years, the only things they build quickly are stores and DVCs.
Yes, great point about the conversion from cash to DVC. Deluxe Resort occupancy rates are down. It's why we've seen recent examples of cash rooms being converted to DVC. AKV, BLT, and now the Poly. WDW is actually reducing its inventory of Deluxe Resort rooms. It seems a lot of "guests" don't like paying $400/night for an ordinary hotel room. Go figure.
Regarding the bungalows, I can't imagine them not negatively impacting the current ground level views. Sure, if I'm up a floor or two at the Poly I should be able to see over them but, from ground level, I suspect it will be impossible to not notice them.
With the Poly DVC scaled back, it's sure to sell out relatively quickly. It's small now, like VGF. Corporate Disney is going to want to sell something else and as long as "guests" are willing to take out high interest rate loans to finance them, Disney is more than willing to accommodate them.