So he should rush the story and get them to Raftel already? Dude, even Silvers Rayleigh said it. The important thing is the journey, and that will be the key point when they'll have to decide what to do with the "One Piece". This just reads as someone who's tired of the current arc and maybe you have a point there, but wanting Oda to actually rush everything only for the sake of achieving the goal is quite perplexing...
You need to have progress.
Naruto's chapters continually raised the bar and were directed towards a specific goal. Every single one of them. The ultimate goal is to united people and become hokage. That is Naruto Ninja way. Part 2 has been a mess, but it continually dealt with defeating the Atakashi and finding Sasuke. Every arc brought him one step closer to those ultimate goals and it was clear and defined at how it was.
One Piece is employing a similar effect. Luffy wants to become king of the pirates and find One Piece. It's an adventure as you said, but that is also the issue. Not everything on the adventure has been progressing the main arc The first standout point was SkyPiea. When I first watched it, I thought it was a filler arc. The only connection to the main world with this story was that fact that Roger went there. They even introduce an overpowered character, who is completely separate from the main world. You could completely remove it and nothing would be missing other than a few tidbits or notes. This is the issue Oda has. He goes off on these tangents at times where it feels like no steps are being taken at all to approaching that end game. Another good example of this is Ippo. The author spent so long with title defense for Ippo of the Japanese belt, when the end game has always been the world title. The last time Martinez was relevant was way back in the 300's. Ippo finally just got to the world stage in the thousands. You get less than 50 chapters a year. Spending that time on an arc like Skypiea was a waste when the world he created was so disconnected from the current. Even currently in One Piece, this arc is the first since Whitebeard's death and the reunion of the crew. This is nearly 3 to 4 years ago. A lot of times the actual story development was done in 1-3 chapters with the supporting cast rather than involving the main crew. Luffy feels detached from the world. Him vs the current baddie is the first real time we are getting to see Luffy test his might against someone who was actually introduced as a major opponent prior to this chapter. We're we can see his new scale of power.