It seems like a small, even silly thing to do, but complexity creep is a real thing in cube
It's a real thing in Magic in general. When I look at the cards on my cube, newer cards have much more text than older cards do. For good reasons, mind, but the difference is there.
For me this is important because the people I'm going to be playing at my local boardgame club and I know my players will face some problems.
1) They'll have to read the cards. Half of the cards in my cube are modern, half are older. There's only going to be a couple people there that have played with both Urza Saga and Innistrad and none of them are me!
2) It's not the game they are used to. The players who played back in 4th edition and the players who started in Kaladesh will see Magic in my cube is not the game they are used to.
3) They'll draft simpler archetypes. I think most players will build fairly generic archetpyes like "Black/White control" or "put similar cards together". I have to keep that in mind when building archetypes. I'm also going to provide a short page to them before the draft listing colour combinations and some of the possible decks so they know "hey, this sacrifice a creature card is a good pick!"
That said, I'm mostly building a cube I like and I know I'm supporting ideas that might not get played very much, like Lands.
4) They'll misevaluate some of the cards. I know the "modern era" players will misjudge some of the older cards. I know people are going to think Yawghmoth's will is stronger than it actually is and so on. And that's fine, but these cards shouldn't be traps.
I haven't started to cull by complexity yet, but it's something I have on the back of my head. I know I have like one or two "spectacle" cards, only one morph and so on.
It is my understanding and my point before that each cube gets more/less complexity points depending of the players who has to understand and enjoy the playing experience of the cube.
I would simply say that complexity is a cost for your players. The more complex you make your cube, the more effort and knowledge players will need to play it. So if you have more involved and knowledgeable players, you can incur in higher costs because you know your players can support them.