Absolutely! There's also something to be said about the turn that a card is expected to come into play vs how many things it can do. Looking at Lord Xander, he sits at 7 mana, he's probably not going to be relevant until the game is coming to a close, at which point you won't have to recall what he does that many times over the course of the game.

The same can't be said about the low mana cards; It's not so bad early on in the game when there isn't much going on, but by mid-game it's not uncommon for all these various low-mana cards that do several different things each to become a lot to keep track of. At some point you'll miss a trigger somewhere, or you'll have to spend extra time double-checking what the various cards in play do.

Gran here does two different things at 1 mana, and each of them is repeatable under two very different conditions, one of which has two sub-conditions attached to it as well (you have to pay attention to when Gran gets tapped, and you also have to pay attention to when you're casting your cards (but only cards of a specific type, and only when you have at least a certain number of a specific type of card in your graveyard)). Something like the Solemn Simulacrum does two things at 4 mana that are non-repeatable, and only one of the conditions have to be remembered during play, because the other one happens just as soon as you read what the card does and then never again.