Well, the "let's ask them to modify this later on" settles it, if there was any doubt or hope this wasn't permanent. I'm incredibly disappointed in this progression for the reasons I stated in the spoilers (basically, I see this as cheap and as being out of nowhere and of character as he's got ZERO merit or link to the suit's actual creation).
As a temporary thing would be cool, like Nightmare Luffy, but not more than that.
The Cape is used as a shield, but the meat is in the invisibility. So I don't know what Oda's gonna do beyond a change in hairstyle and hopefully the boots. It all comes down to how much he wants to keep Sanji "clean". For all we know, he might only want to keep the invisibility thing. But why would he ditch the extra-protection granted by the suit?
This is really, really turning me off the manga man, as stupid and petty as it is. The only decision I recall by Oda (Sanji's Fishman Island embarrassment and women's treatment aside) that genuinely makes me sad. Oh, well.
The BM thing I don't love as a trope (and she has been a bit mistreated for a while, the poor thing), but it could lead to very interesting things with Chopper there. Also, Pudding could play a part later on if she doesn't regain her memories on her own.
All in all, fun chapter. Also, early chapter next week it seems.