I got the 184 FR ST in April, and am averaging 49.9 over 6000 miles. Much of it’s been short distance stuff round the lanes here, with a lot of 4th and 5th gear, but on longer trips on motorways it averages 60+ at 70-80. I do tend to drive it mildly (especially when my wife’s alongside).
Like you I don’t see a lot of point in throwing money at mods, I just wanted a new car!
But I’m tempted by DTUKs tuning box……quite like the idea of another 50BHP, 60NM torque, and better mpg. might be £400 well-spent?