TEB was a unique damage modifier as we more or less had proper active control over it. Hit combo is close to passive and places ability restrictions (CX would work horribly with hit combo).
TEB gave us control over high dps windows more than any other class which is particularly important on the harder progression fights. Think blast furnace in BRF WW was great for getting those immune guys down when they were vulnerable. Cenarius would also be a great fight where TEB would shine.
Basically any fight with damage boost windows or high priority targets TEB was a winner.
TEB also worked great with ppm trinkets however ppm trinkets.
TEB wasn't perfect but it was definitely more fun, active, less restrictive of game play/abilities and had room for player improvement.
Hit combo was a lazy adjustment to WW and combination with the new SEF WW was turned into another generic spec.