It's most likely because those maps actually did perform well before recent updates. Forge performance has really gone down the gutter the past couple of patches. That and still keeping badly performing maps in is on 343.
Ill give you if somehow the patch has cut these maps off at the knees.
Which I cannot prove or disprove.
But, 343 has the patch, they have the maps, You can't just blindly patch things and then just accept its screwed up after its live.
They can rely on CC and stuff only so much, I know they double check it themselves. Why didn't they catch this, why do they allow them in the rotation?
The other thing is, the maps that dont overdo the aesthetics are the more visually appealing, typically.
But why does that matter, would you rather play competitive multiplayer on a map that's A+ visually and choppy or a map that's B- visually and smooth.
The answer should be B.
I know I'm way too fired up on this, but it's so annoying that these things keep happening to where forge gets the blame and blanket statements are used to negatively reflect all forge maps. It's been happening since Reach.
Also, everyone has their one thing that irks them, basically nothing in the world gets my jimmies rustled, except mismanagement of Mk V and Forge. I've got to get my hyperbole out somehow.
Then there's Avalanche that looks great and runs well. Some Wizardry went into that map.
Simplex also looks nice and performs well. It also plays better than Orion/Pegasus, 343.
First, thanks
Secondly, yeah I know, that map is purposefully "under decorated" and huge effort went into ensuring it was not over designed or engineered in any aspect and whaddya know, it has no issues with perf.
Also, fwiw
I've checked, and none of my maps have developed frame drops, including highlands which has one of the longest interrupted sight lines of about map I've played in this game.