From my use and ownership of multiple sizes of SUVs and 2 generations of Land Cruisers, having a 16mpg 3200 lb car and 87 mpg-e EV in the garage, I'm no more satisfied or unsatisfied with the gas efficiency of the 200-series. It's just right for what it is. Which is a giant fat tired 6200lb, hugely capable land bruiser. I didn't buy it for MPG efficiency.
I'll note that it's more powerful AND more efficient compared to the '06 LX470 100-series I had.
Where this latest 200-series has gone wrong IMO is perceived mpg inefficiency. Due specifically to the need to get gas too often. Because of the too conservative fuel gauge and remaining range-o-meter.
The 200-series has the same 25.4 gallon tank as my 100-series. Even though the 100-series actually got worse MPG in my use, the 200-series "feels" worse. I keep gas logs. I use to fill my 100-series 20-22 gallons regularly. Whereas the conservative 200-series gauges causes me to fill regularly at 18-20 gallons. Even as I consciously compensate for the gauges conservative nature.
In a thirsty full size SUV, it causes me to live at the pump and feel like I get terrible gas mileage. This is a completely contrived perception issue that is not helping its case. That's 40-75 usable range on the table when I get gas and its irritating.
Fast forward to today, and with my 12.5 gallon LRA aux tank. I'm in nirvana with
500 mile range. 12.5 gallons doesn't feel like a lot, but it's a full
66% expansion in usable capacity. Many times, I feel like it's time to get gas as it's been awhile, yet I still have plenty of gas left. Road trips are no longer pock marked with gas stops, sometime 2-3 times a day. It's now once a day or every other day that I have to think about gas on a trip! My stops are where I'd like to visit or have lunch, rather than another gas stop and bio break at a dirty station.
This has gone a huge way to making me no longer feel like my vehicle is a gas monger.
Just don't get in line behind me at Costco as I fill 32+ gallons of fuel.