Man you guys suck at this. Tenative tier list from someone who's just woken up, with some quick explanations.
>Steel
Amazing defensive type as always
>Flying
Phenomenal offensive type with useful defensive attributes and great support moves
>Fairy
Broken match-up spread, only held back by 90% of fairies sucking
>Water
Very strong all around type, but not completely busted in any one way.
>Ground
Phenomenal offensive type with a useful immunity
>Dark
Great moves in knock-off and sucker punch, but has been nerfed a bit by the loss of pursuit, hates that everything carries Body Press now.
>Ghost
Immunities are fantastic especially with everything knowing Body Press now, great offensive match-ups only hindered by lack of good Ghost moves, good support moves, still doesn't appreciate how universal knock off still is.
>Dragon
Still hurt heavily by fairy existing, but at least it has useful resistances, great set-up moves, and Outrage/Draco Meteor are still fantastic moves
>Electric
Decent overall but hurt heavily by lack of good high bp moves.
>Fire
Useful resists, strong moves, but hurt heavily by bad weaknesses.
>Grass
Great utility moves, useful resists, but exploitable weaknesses
>Poison
Kills fairies
>Fighting
Strong moves that hit key types like Steel and Dark, but not fantastic defensively and has fallen into an ice situations where you'd rather have a non-fighting mon carrying fighting coverage than use a fighting mon.
>Psychic
Mediocre offensively and defensively, but at least generally has interesting abilities.
>Ice
Very strong offensively despite lack of good high bp moves, absolutely awful defensively. Aurora Veil is fun at least.
>Bug
Bad offensively, mixed bag defensively, can be great when paired with certain types, and can have access to some busted as fuck moves like QD.
>Normal
No offensive niche, no defensive niche, needs something busted like ES, Huge Power, or bloated stats to work.
>Rock
Strong offense, but generally bad stats and poor defensively.