Yeah this stop/start thing is definitely something new for me

I do love the oil filter location
We have a new outback - it didnt survive break in unscathed. It's knocking loudly on acceleration. I did the OC at 2000 miles. Shut off the start stop at least until you got some miles on the engine. My wife has gotten into the habit of shutting it off every time we "boot" the car.
I don't like the new Subaru, having owned 8 over the years. They cheapened the interior - maybe the limited is better but the window switch gear and trim plates is made form thin "thow-away" plastic on the Outback.
In the recent The past subaru CVT didnt want you changing the fluid our 2017 Crosstrek was sold with over 90K on the odo and it ran just like new,
As for oil, If I had it to do again ( with what happened to THIS car) I would have dumped the FF at 500 miles and run a conventional 5W30 like (QS green bottle)
for 2500, then do that again of another interval , and only then go to a good synthetic at 5500miles. I would make an effort to get the quality Toyo Roki oil filters from Mazda. The Service replacement is a Blue painted Fram with a nitrile adbv but it does have a P gasket (or lipped, captured O-ring) that doesn't leak.. The ADBV doesn't seem to work, but with the filter at the highest point of the engine, it probably will never function. I agree also to replace the rear diff fluid after wear in/ 1 year.
Supertech 75w90 synthetic works great. Mobilube HD 80W90 - that the dealers use around here at Nissan and Subaru service centers - is absolute garbage, I had to dump it on my older Nissan rogue and the wife's subaru due to excessive gear noise and loud whine.
Any reason why you didnt go with an Chevy Equinox?
Good luck, have fun