I think like you do.
When I went to purchase I asked myself when was the last time I actually needed or engaged the 4WD in my Suzuki XL7. turned out not so much...couldn't remember the last time I'd used it other than the once a month "exercise" (figure 8's in forward and reverse at the sand pit) I did to keep thing lubed and etc.
I'm rolling in a FWD, doing 200 km a day about half on industrial and logging roads in all weather including snow and ice with zero issues.
In fact the thing is a tank in snow...using dedicated winter compound/tread tires mind you.
I'm getting low 30's mpg, up to 35 in summer and that is with loads of stop and go and about an hour and half highway per day. That is our larger gallons but still that is either cruising at 2,300 rpm or stop and go with that mostly on logging roads with what a lot of folks would see a need for AWD or 4WD. You will kill the mileage doing mostly highway...just keep the RPMs down. cruise, don't blast. Rool on, roll of the throttle, basic stuff.
And we, of course, demand pictures of your new Patriot when you get one.