Doesn't thresh crowd out other supports?
Leona? Ha just hook the adc or her. Flay will also keep your adc safe.
Braum? Ha even if he w's to the adc, you still open up the target late game and you bring more utility with dark passage. (Really saves lives unlike jumping in to save them)
Lulu? Hmmm can ult the adc I guess but squishier too
Soraka? Heals and all but brings little cc except for E
Janna? Okay gives thresh a run for his money in utility but squishy
I feel thresh is good in ANY situation if you are good with him. Against equally skilled opponents thresh should win due to his tankiness especially late game, peel for the adc is huge, and his freaking lantern to protect anyone caught. Thresh also doesn't fall off and blitz just got nerfed soooo
is better for an all-in engage comp, and she can fill in as a second front-liner if you are doing an AP top laner.
is better for an all-in engage comp as well, actually maybe the best support for that role.
is better for poke comps. Also she provides the best anti-cc shield in the game and that's not something you can ignore when comparing the two.
has her niche where she's better than
when paired up with a hyper carry like
and he's tanking the world from the front line.
peels better and you see her a lot for that reason.