First of all I am LOVING the tier right now. Playing feels less random and there are also some new mons to play with. I will share some thoughts:

Out of the new mons, this is imo the first and maybe only one to go to back to ubers. Sure, it no longer ohkos the entire tier. But I feel like it still does too much and always takes a good trade. Its stats are absurdly min maxed and it does not really matter that its speed is abysmal considering it eats everything you throw at it. It is worth mentioning that steel is weak to ground, fighting and fire. Ground does not feel as much of a weakness due to the combination of its massive defense to eat up mostly physical earthquakes, and ice punch to scare lando and gliscor. Fighting is a pretty bad type due to all the ghosts running around. It has quite a few feasible sets and is generally pretty hard to wall (rotom-w does a great job, but may eat a toxic).
I think it has the whole suspect package: great offensive and defensive stats, few reliable checks, set flexibility, and ways to annoy those few reliable checks. Melmetal feels relevant into every matchup

Pult does what pult does. The wisp hex pivot set is an amazing utility mon. I haven’t really seen dd z move or specs do what they used to do previously, probably due to gambit existing, but they are still pretty strong. I have yet to see screens pult on ladder.

A great addition to the tier, doesn’t feel broken at all without tera. With tera it could cheese its weaknesses and run away with games in an unfair manner.

A bit underwhelming right now, but I expect to see a hsam gholdengo team terrorize ladder very soon (as soon as the moltres hype dies down)
Other things which I feel like need mention and havent been mentioned before:

Imo the one of the biggest winners of the tera ban, especially the attacking sets run on balance and offense. Diancie always had the power to ohko so much stuff but would fear a tera out of something that should have no business living its hits (all those tusks and garchomps) and ohkoing it back. Basically, without tera, its much harder to hit diancie and exploit its many type weaknesses.

and

Their main downside has always been that tera with protean is awful, so they were always at a disasvantage because they couldnt really use it. Cinderace always had its court change niche, now more important than ever. Meowscarada is a coverage rich mon, relying on super effevtive hits to do real damage. It can now claim kos better than before without tera steel walling it.
Some more general observations:
There is a high competition for the steel type slot(s) on the team. Using something like mmawile is an opportunity cost on not using gambit and gholdengo (or using them and sharing weaknesses).
Balance is back. It was probably the playstyle most affected by the tera cheese, as losing 1 mon to tera would always be very bad for balance, potentially game ending.
With melmetal and many more running around, and with much less waterpon and kyurem (thank god), rotomw is bound for greatness and I see it coming back to OU soon enough. Also no more tera grass heatran, and no more tera fire to dodge burns, always a plus for our favorite washing machine.