Sure, but I think part of the slow build up for Directs was down to people not really knowing what to expect. In the sense of whether Nintendo was going all in with their announcements from now on with this, or was it just some experiment that they were working with. Once it became clear that it was their main way of sharing news it gained traction. So, if Sony came out and said they they were doing a new SoP focused on the PS5, that's really all they need for attention. They don't need to be packed with other publishers. Similarly other big publishers could make it clear that they're going to be showing something that fans have been clamoring for and that'd ramp up hype for it. In other words, all that really needs to be done is for people to know that this is a stream where big announcements are going to be made. Once that's set in stone the attention will follow.
