Horrible Mechanic - Tumblr Posts
I guess she had unique mobility advantages before but comes Season 1 and now you can just use Boost if you wanna skip neutral like that. Makes the risk and input of her tail movement not worth it when you can just waster a bar of meter instead.
Don't get me wrong, Tail-Tether is actually insane when in the right hands and leads to more offense opportunities than if you just Boost in, but you can still get swatted during it and Gaia help you you're fighting a Knuckles.
And as I've said, 2M's tailbox is the less aggregious of Tangle's hitbox problems, it's another nail on the coffin to her viability, you could say.
I'd argue Tangle doesn't deserve to be so low on people's tier-lists but I still get how she's a case of base-game character not adapting well to new system mechanics. Heck, I shed a tear for all Tails players trying to run zoning with Knuckles Lariat and Metal Beam being the META. (Geez, friggin' Espio runs a better zoning game and he's supposed to be the rushdown pixie!)
Tangle Low Kick

Ain't Christmas yet but we already got our nutcracker.
Just a little something to get motivation back.
... Uh... Kicks were hard, I suppose...
...
2M

Standard 2M that's plagued by the same hitbox issues that keep Tangle a low-tier.
It's fast, has decent range, Tangle moves back while doing it and is a reliable hit-confirm.
The problem lies with her tail having a hitbox, giving Tangle no low-profiles, which is a crucial feature for most 2Ms in the game. A problem shared with Eggman and Omega.
It's far from the most aggregious case of tailbox, but one that makes the Metal Sonic matchup a living hell when he doesn't have a good low-profile poke countering his unblockable beam.