@desa:
She handled pretty Mr 2 easily, back then.
The guy who purposely put himself in her path to provide bait… and then escaped from her multiple times? And pre-timeskip at that?
If the growth of SMoker and Tashigi is any scale to go by, anyone that wasn't a vice-admiral already is kind of sucky by new world standards... even the previously unbeatable Smoker was beaten soundly and repeatedly once Haki came into play... and Tashigi is a complete joke..
Coby will be a likely exception.
No. Hina will not be a formidable or scary enemy at all. If anything, she'll be on the "good" marines side, going against the bad ones.
Maybe. Considering how big the cast will be I doubt Oda will be able to put 11 long battle without it being to long. But even then between the admirals, the absolute VAs, Kuma, the last Shichi, the different… I doubt worthy opponent is what is going to stop them.
For the SERIES FINALE? You bet he's going to go all out and give everyone an epic final showing. He did it for Alabasta, (with a few less people sure, but still a lot) and on Enies Lobby, and that took a year, but everyone got a fight (Luffy got 2, and Sanji had stuff on the train) and only Brook has added since then. (Okay, Usopp and Robin didn't fight so much but they did face opponents and Usopp was all over the place) During Fishman Island everyone got a fight in a big group brawl. They were all really short fights, but EVERYONE got to have an opponent. (Okay, Jinbe and Sanji tagteamed.)
Yeah, it'll take a while to get through, and in the middle that could drag… but for the final? Sure, then it won't matter then if everyone is getting 5 or 6 chapter epic battles with huge unequaled scaes and swathes of destruction that Oda won't have to ever worry about topping.