Oda has done this reunion beautifully in my opinion. First we have a bloody long time of separation, mainly focussing on Luffy. Than we have deaths of 2 major characters and suddenly, before the reunion, there is a 2 year skip for which we have to wait 5 weeks. Now that the moment is finally there we get to see most of the SH's, some interacting, new marine developments, new rookies, new character designs and even some hints of power up with Nami and Ussop.
This chapter has it all in my opinion. I really hope Momonga is coming to SA to capture the SH's, I'm very sure that he will not mistake the real SH's for the fake ones, certainly not Luffy and with MH being in the New World now, it is ensured that smoker will be in the New World, patiently awaiting Luffy's arrival.
I think the power ups the SH's got are major. If you look at their progress in less than a year, these 2 years training must have seriously boosted them (And I mean TOP TIER CONTENDERS). Ussop really does look like a brave warrior and isn't afraid anymore, which I like. It shows real growth in his character. The fake Sogeking/Luffy reaction was more being surprised than anything else.
Don't really like Franky yet though. I guess he's going to be able to do some crazy stuff, using Vegapunks notes and blueprints but right now I'm not feeling it yet.
Also, Luffy mastered everything Rayleigh had to teach him in 1,5 years while Rayleigh said, normally, one would need about 2 years to cover the basics. Guess he truly is a natural and his resolve has only grown the past 2 years I guess.
With the stuff happening, caused by the fake and probably weak fake straw hats, marines will go to the island to capture them and they might need to face some +100 000 000 beli rookies and high level marines so what the fakes were doing couldn't have come at a worse time.
Perhaps the SH's will have already defeated the fakes by the time the marines get there and they will notice they aren't the real ones and will learn that it was the actual strawhats that defeated them. It would also be fun to have someone like Ussop, Nami or Chopper defeating those marine slaughtering rookies to give a hint of how much they've evolved.