Yeah, even oil changes are no joy on the 2010+ Legacys. They are so low, you have to lift the front-end off the ground by the center/front jack point, or hang the front end over a low spot to get enough clearance for a drain pan and room to work. As with any low, modern car, you have to be careful where you lift from. There's not much that's solid under there.
In regards to the small 'removable' plastic panel that covers 3/4 of the oil filter; The plastic clips at each side will fragment into 100 pieces if you try to remove them in winter temps. The fasteners in the center are no problem. It's still annoying enough that I left that panel permanently off after the 2nd oil change. There's no need for it, other than to frustrate owners into going in for oil changes.
I still do all oil/fluid changes myself, sparkplugs, brakes and basic maintenance, but there's lots I'll leave for the pros.