This is likely true.I am not sure that I would agree, but I think it is all a preference here.
Sounds like a false dichotomy...I could see a skill challenge for a minor skirmish be resolved with and Athletics group check for all melee fighters and a group Arcana/Religion check for the magic/divine users. Question is what fun is that?
The two round finds sound like you find 3 orcs in a square mostly empty sound proof effectively context free room OH look break out the tactics free basic attacks ie it doesnt sound interesting at all... whittle whittle whittle. Sounds un fun to me indeed.
Sometimes you are just showing the area is dangerous and would be deadly to the ordinaries of the world and heros can waffle stomp them. (ie their presence is flavor rather than real danger)
The only way I think they should or need to be a challenge and worth much at all is if they they are only a portion of the scenario ie they occur within a greater context of a regular skill challenge or something which escalates into a larger battle scene unless handled with care (which is where other skills come in to play). ie perhaps they may sound alarm that will bring another wave of enemies or trigger a trap that diverts passage requiring figuring out the ancient writing and the complex mechanisms or floods the area forcing everyone to do athletics including that erudite fellow ... or inspires the party to start using that ritual for breathing water on a more regular basis.
But if you prefer a bunch of boring 2 round isolated fights whose only purpose is to whittle the player characters down and make them vulnerable in the end fight have at it. I kind of like having player characters being at a fairly predictable degree of ability (arent you giving that up)
"There are two ogres stepping out in the road. You quickly kill them and recieve 400 XP. You are now finally on your way to the Dungeon of Doom".
Since 2 round fights cannot really involve tactical choices not sure how they would be any better..
Indeed remove the XP all together from the above... unless its actually interesting and involves thinking, OR even that house rule about Advancing characters levels when it seems appropriate after N adventures (One mentioned by the game designers i vaguely recall)