Robin is quite good as well. Her new usage to create an entire person is amazing. Surviving in the new world is not something you do with strength alone. There are other more relevant abilities. Besides, be sure that in the up coming arcs, Luffy and Law will flip the new world upside down. And it's not like Shanks would kill him. And all the remaining Whitebeard crew and allies, would probably also spare the strawhats a fight.
It's true they got beaten easily from what we know, but this is how it always is in One Piece. You start by losing, and then make a comeback somehow. I do, however, think that Chopper is quite strong, but he is a "*****" until he mans up for a fight.
"Admiral-level" is the strongest level within the Marines. I know and understand all these points you're trying to bring up. MY point is that people say "the Strawhats have to be above Admiral-level" like it's a fodder position. Garp was "Admiral-level" and almost killed Roger on several occassions. "Admiral-level" to One Piece is like "Kage level" to Naruto. Several of them are stronger/weaker than others, but they're not simply "solo'd" as if they're fodder. There's a reason there are only three/none of the Vice-Admirals were promoted. It takes a special skill level to be an Admiral. If the Admirals were as surpassable as you make them out to be, Whitebeard or another Yonko would've wiped them out long ago.
I'm not saying you're wrong, I'm just saying that the Admirals won't go down as easily as people are assuming they will once Luffy becomes Pirate King. Nor does Luffy have to be as strong as everyone wants him to be to become credible enough as Pirate King. He can match the Admirals or defeat them in a Crocodile situation.
While I agree with this, I do think that Sakuzuki and Aokiji were unique. There wont be an admiral of their level again. Also it seemed pretty clear to me, that Silvers Rayleigh were stronger than an admiral. Judging from what they said at HQ, they needed countless marines to try and capture him. I don't doubt the new admirals strength, however, luckily you don't run into more than one of them at a time very often, and thus they can probably manage.
Also I wouldn't go and call them the "strongest" just yet. I know that is what the ordinary marines say, however, I've noticed one of those old guys running the entire world government. He has a badass huge sword, and I imagine such old folks could easily be of the same level as Silvers Rayleigh. But who knows.
Well i think luffy solo's an admiral now, remember we have barely gotten into the nw after the ts, and every thing luffy faced he smash and kicked the living shit out of with ease, and not yet have anyone the straw hats fought seriously after the time skip, not zorro or sanji, not chopper or franky, not robin or nami, or not even ussop.
I disagree that Luffy can solo an admiral. First of all, it's a type of battle, that would take very long. I do, however, agree that they are much stronger than what we've seen. If it was really important, Luffy could perhaps beat, whoever is the weakest of the admirals, however, if he were to fight Kizaru alone, I don't see him winning.
We know for sure, he hasn't mastered all the Haki's . He has learned the basics, and thus he will keep evolving and become better at using it. When he has mastered it, he can stand up to an admiral alone.