Maybe, but with as many wipes as there are in the Crystal Tower trilogy of raids, even when you go in with a full party and do your part absolutely correctly, it's scaled so that if even half the over all group isn't up to par, (with the bar obviously being pretty low for those three as is), then you will be struggling to clear it. If it's content designed around having to go in as a pre-formed group as the OP is suggesting though, then it would also be scaled around the idea of "cooperating" with the other members enough that PF members, non-raiders, or people unfamiliar with the content would begin causing issues in even small numbers.....
Not to mention the fact that trying to PF a group for anything post the first month of it being out is very difficult at times, much less if you were trying to form a full alliance with it. I actually checked the PF on my server during prime time a couple of days ago, and the only ones there were a couple of Ravana EX farms, (both with half a party's worth of members), someone using it as a "/tell and make me offer to buy item X" party, and one FATE farming group. And this was during prime time. I went into the PF with some friends a few weeks ago to try and do a Garuda EX run, during the time we normally play, (slightly later than prime time), and we sat there for about an hour with no one joining even when using tells to advertise it. Again, particularly with small groups of players such as my FC, I can't imagine how difficult it would be to get a full PF group for a pre-formed 24 player raid after all the more "hardcore" players are through with it. And even if we could, chances are it'll be the same as going into the DF anyhow in terms of players cooperating, with the only difference being that it would take longer to set up and get going.....
Then comes the issue of difficulty. Either it's as difficult as Alexander Savage and you're forced to use a full static to clear it, or it's easy and becomes as dead as the Crystal Tower trilogy is right now after the gear in it stops being relevant, but with the added restriction of being locked behind needing pre-formed alliances. Anything in the middle will make it too much trouble for 90% of the players to deal with, while making it so that the other 10% will either give up on bad PF groups, or will just be using a full static anyhow. There's no middle ground here that would make it both accessible to players outside of large free companies, and make it difficult enough that even partial statics will be needed.....
Don't get me wrong here. I'm all for larger scale content, and when I saw that there was going to be a new 24 player raid in 3.1, I was particularly excited. I'm just saying that gating more such content behind the restriction of pre-formed parties will just make it so that the majority of players at that point in the game's content can't access it in general, even using the PF. As is, there's nothing stopping players from forming statics on their own for 24 player content, aside from the players themselves, but making it mandatory for some content isn't the way to go.....
I'm sorry if I became repetitive in what I'm saying, or didn't convey my point as well as I intended. It's late here and I'm headed to bed soon, so I'll just blame the lack of sleep......