I'd take the time to max everything if it provided me with some amount of tangible benefit and not kudo points from my internet brethren.
I'll provide an example: I watched a group of grown ass men huddledd amongst one another in a parking not far from where I work obviously leveling some Valor gym up as I drove past. About thirty minutes later, I see the same guys in the parking lot as I myself am on a smoke break. I literally just walked up, pointed my phone at them, and begin to dragonite faceroll their level 7 gym full of 2000+ CP Snorlaxes / Dragonite and like 1 or 2 Lapras.
I didn't look at my phone, I just kept it pointed at them. I just tapped it. No dodging. They watched me take three out before they died and I just popped revives and potions, rinse and repeat. This went on for a few minutes before I had de-leveled it already.
"Man, that's fucking stupid."
Yes, yes it is.
There is nothing those IV's (yes, obviously outside absolute single digit % shit-tier, but let me know when you find a dratini with one) will do when defending or taking a gym outside a marginal time adjustment. All you need are consumables, anything slightly worth a damn within striking distance of whatever you're attacking and time. Provided I'm in Houston, it's predominately time. I could have literally handed my phone off to a small child and told them to repeatedly tap it during each fight while I smoked.
I'll record myself doing it sometime later.
I should be able to piss in people's cheerios, just not this way. There's nothing distinguishing you and your perfectly groomed 100% IV pokedex line-up from Johnny the Ritalin-addled 10 year old who just so happens to have all night to zerg down a well-diversified gym you set up.
So that's basically what I do with my pokemon at this point and I am strangely having a grand old time, especially when other folks tag along as well.