it doesn't make any sense for him to want to KILL THEM LATER. If you are an Admiral with the ability to annihilate an entire crew of a Yonko, why waste the opportunity and wait later???
You are engaging in hardcore speculation lol. You are just assuming that it makes no sense for Ryokugyu not to kill Shanks and his crew right then and there, and then based on that assumption, you have determined that he cannot kill them when Ryokugyu literally confirms that he can kill them lol.
Killing Shanks would further upset the power balance when Ryokugyu confirms that the outside world is already a shit show lol. It’s highly probable that killing Shanks is something Sakazuki does not want at that moment since this will further cause chaos for the Navy. It’s also highly likely that the Gorosei do not want their slave killed yet.
Do not forget that Ryokugyu is “fasting” and we do not know why. He has his own political goals and motivations that you do not know what his reasoning is yet. The point is that saying Ryokugyu cannot kill the entirety of the Red Hair Pirates when he literally confirms that he can, is the type of unnuanced monkey analysis I would expect from a Yonko fan. Lol
Aramaki is an Akainu fan, meaning defeating a crew of a Yonko would be perfect for him to achieve Sakazuki's approval, no way would he wait later to kill them
Citation needed??? Like I said above, there is zero evidence that Sakazuki wants Ryokugyu to kill Shanks (or even Luffy really lol). Do not forget that Sakazuki did not want Ryokugyu to even go to Wano in the first place, it’s highly likely Sakazuki doesn’t want any of the Yonko to fall right now, and Ryokugyu is just assuming that killing Luffy will please Sakazuki since Sakazuki was specifically trying to kill Luffy at Marineford lol.
The phrase "Not Yet" means that he was referring to numbers, meaning he would need help to accomplish such a feat.
I already made a thread on this. Ryokugyu states that he and he alone will eliminate the Red Hair Pirates. And Ryokugyu does in fact distinguish between when he will do something alone, and when the Navy has a goal it wants to achieve.
Ryokugyu confirms that he alone can eliminate Shanks and his whole crew, and you are making basic monkey assumptions to deny this reality lol.