I've seen quite a lot of doghouse installations around where I live go belly-up in favor of protected-only signals, some for no particular benefit. Is this a trend elsewhere in the state?
For example, this intersection until a few years ago had a permissive phase.
https://www.google.com/maps/@41.8102869,-72.5550086,3a,75y,15.13h,96.91t/data=!3m6!1e1!3m4!1s_vQmGHN1QknLkpNROJshoA!2e0!7i3328!8i1664 (https://www.google.com/maps/@41.8102869,-72.5550086,3a,75y,15.13h,96.91t/data=!3m6!1e1!3m4!1s_vQmGHN1QknLkpNROJshoA!2e0!7i3328!8i1664)
With your example, it almost certainly went to protected only because they added a second left turn lane.
Haven't seen any changes in my neck of the woods. Queen St in Southington is a mix of permissive and protected turns. Both I-84 ramps, Spring St (a double left turn lane), the southern entrance to Shop Rite, and the entrance to Queen Plaza (with Bob's Furniture and Bed Bath & Beyond) are all protected. A permissive left is mixed in at the north end of Shop Rite plaza. Everything else south of I-84 is permissive, including Price Chopper/Loper St, OS Job Lot, and Walmart.