[Back In The Saddle]

In my games, the paint is a dual coverage area. T has a better look at quite a few things. Traveling in the post has been mentioned. When the post player curls away from the L, the T often has the only good look. Back side contact away from the L is another. With larger players, usually the further from the baseline the harder it is for the L to get a clear look at a play in the paint. A play right in front of the L that goes vertical, that's often difficult for L to see contact up high at the same time as contact on the body. Rebounding is a primary responsibility for both officials. Weird crap that happens "in traffic" in the paint is another place where the T can usefully help out. Pass and crash is another.

IMHO the T's appropriate assistance in the paint is very valuable and should be both welcomed and encouraged.

Edited to add: When the L goes out wide to referee on-ball in his area, the L's post becomes the T's secondary. So does any must-get off-ball stuff in the lane.