In the Australian upload there are two bottoms under the TIGHT designator. Both are made of Full-on Luxtreme so I would like to equate TIGHT = An all Full-on Luxtreme item but under the next looser category, HUGGED, there are also bottoms made of full-on luxtreme so I'm not sure what the defining characteristic is. The new TIGHT pants also don't seem to have any special panels or seaming to add compression but the photos are pretty terrible so it's hard to tell.
HUGGED seems to include most of the bottoms now - Inspires, In the Flows, Wunder Unders, Speed Tights, High Times. etc., and a variety of fabrics. This category has both run and yoga-oriented bottoms in it and seems too broad in functionality.
HELD IN - is a single pair of crops called Zone in Crops made of knit material with compression zones.
NAKED is a single pair of new Align pants made of NuLu.
RELAXED are all loose fitting bottoms - Yogini Trousers, Studio Pants, Jet Crops.
The new categories are either too narrow (NAKED, HELD IN) or too broad (HUGGED). The ability to sort by activity, such as for RUN bottoms, is gone. My own personal collection tends to be split along heat management (i.e., I need cool clothes for running or spin) and functionality. So all my run bottoms are together, my general gym bottoms consisting of Wunder Under Crops and knit-type bottoms like In the Flows, and then everything else is casual - textured luons (pique, herringbone, jacquard, denim, etc.) which are too hot to work out in, loose pants, and track/sweat pants. Temperature definitely takes precedence over compression for me.