I can see why someone wouldn't like it.

But we've had the Allagans, the Loporrits, all of the Omega/Omicron stuff, heck a dungeon showing robots waging war with dragons. Garlemald including both military bases and now seeing their ruined city. Solution 9 doesn't really phase me. Yes it's a different flavor of sci fi, but FF has included sci fi elements since at least the SNES days, even FF1 had the War Mech. I'm not really surprised or put off by it. Last expansion's climax had us flying a space ship piloted by bunnies to the edge of existence, and then we helped a bunny and a robot open a cafe there. So for me, this isn't realy anything new.

In fact, it having a different vibe from Allagan/Garlean stuff is feature not a bug for me. I'm really curious to see what's up with Solution 9 and it's the thing I'm most interested in story wise this expansion going into it.

Ethairis is not medieval Europe and wasn't even back in 1.0.