I have a Shimano 105 5800 FD on a 2x11 setup...46/36 and 11-32T.

I am noticing that with a perfect front derailleur setup, the trims seem to be "off". In the big chainring with the cage in its outward most position, I can access all rear cogs without rub. As soon as I shift down to the small chainring, i can only access the 4 outermost rear cogs before chain rub occurs. Once i click down to the L trim position, i have no rub on the full range of cogs...is this what you all are experiencing? If I were to try and move the derailleur inboard more via tension, id get rub in the big/small combo

It's normal. This generation of Shimano front shifters shift into the trim position when going from big to small ring, and you need to shift again to get the derailleur into the lowest available position. They made it like this to decrease the risk of chain drop.

That is what the trim is for

Big/big and small/small accidents happen...

Like other intimately private embarrassments, it's best to not publicly admit when they happen.

I just went 11 speed after running 9 speed for over a decade (both Dura Ace). Yeah, the new ones move to the upper position automatically and need to be trimmed down. In other words, without trim the default is set up for the small cogs on the cassette. It is when you move to the big cogs on the cassette that you need to trim out, ie. "trim down."

Note that on any 11-speed Shimano the front der cable tension is set with the chain in the big/big combo and the shifter in trimmed down from the top position. Get the Shimano instructions, makes it pretty clear how this stuff works.

Also a good point. When I had my first Shimano 11 speed, I just set up FD as I would any other FD without reading the instructions and had a lot of annoying rubbing. Beyond setting setting up the shifting in trim position, there is also a switch on the FD that changes cable angle and needs to be set correctly to match routing on the frame