I can see the increase with decor in Parks…specifically attraction overlays and hard Christmas decor. You are correct, aside from the removal of Dream Lights, Osborne Lights, and Lights of Winter (i love Christmas Lights!), thé parks did increase decor at AK, and did create Christmas projection shows on Park icons.
Thé small Christmas touches at Resorts are gone. The white lights of the boardwalk once replaced bulbs with alternating green, red, white. The top of the fancy garbage cans st Yacht/Beach were once planted with poinsettia. Poinsettia trees were included at Moderate Resort tiers and up, and wreaths/garland were placed on outdoor communal guest areas (Caribbean Cay aka Parrot Cay had decor at CBR). Just a bunch of small things that when included all together are noticeable!
On topic, I love an inclusion of Halloween at Liberty Square!