Yes, innovation can be a good thing - if you ask me it was a great innovation to move raids into the DF (instead of having to walk up to the entrance to queue for them), the addition of PF was amazing (no more shouting "We need a bard or paladin!" near wineport when one of the 8 people in your static didnt show up on raid day), even adding the more difficult content to DF so that you can give them a shot (more or less successful) even if you dont get a full party together, being able to unsyc content thats not current anymore and thus allowing you to attempt it with a more flexiable number of people, the new Criterion Dungeons that offer a challenge for light parties instead of a full party (so you only work around 4 schedudles instead of 8), even the addition of Squadrons and Trusts, which argueably into more of a solo-experience but also more into the experience of a game you get to play at any time you want instead of a waiting game if you happent to want (or "need") way outside of primehours for your server.
All those things I'd label innovations - those ideas move away from the notion that finding people to play with or waiting around for them to show up is the main appeal of the game and instead make sure that you actually get to play the game.
I'm starting to wonder - how often have you (or anyone wanting more of this mysterious, innovative FC-content) organised some kind of event that required a large number of people to show up at a certain time? I dont want to make assumptions but my guess would: not to often - maybe because it can be frustarting and tiresome? And maybe thats why you want the game to do that for you, basically? But the game cant do that. The game cant change the workhours, timezone differences and other obligations people have outside of the game that lead to clashing scheduldes. I'd like to see the "innovation" that fixes this problem...
You could argue now that we need something that would lead to people making this game their priority - the FC-content would need to be so great that they're willing to make accomodations to take part in it that they're currently not willing to make. And I'm not sure thats really a good idea or something we should really ask for/promote - I'm saying that as someone whos been raiding with a static with 3 timezones for the past few years. In order to do that, some of us stay up a little later than they probably schuld during the week, some get up a little bit earlier than they'd like so they can join us before heading out to work and some rush home from work - its not an ideal situation for anyone, but its the only way this works. And we're willing to do it this way because we enjoy each others company and playing together, so we're making this work somehow.
But I cant imagine this on a bigger scale - currently this is managing 8 people. For FC-content I'd expect it would allow for a lot more people to join - and ideally for less, too. You'd end up picking your FC based on overlapping scheduldes, not on (social) compatibility. You might end up with more "lively" FCs, but not more social ones.
...or it would have no effect at all, because people would decide that its not worth bothering with it in the first place if its impacting their lives and/or enjoyment of the general game to much. Very likely scenario, if Diadem is any hint to go by. In which case we'd have content thats pretty dead, pretty fast.
All in all I cant help but wonder if these requests mostly come from people who dont realise that maintaining realtionships and specially managing large groups (and keeping them together against all odds!) will always take effort. It wont get any easier if there is an extra incentive in the form of content that you only get to see if someone puts in that effort. And I'm wondering how many people who wish for more FC-content would be willing to be the "someone" putting in the effort of setting a date, that most people can make, making sure that no one is excluded, making sure that everyone gets treated fairly (or at least feels like they've been treated fairly), that no one is uncomfortable and that everyone is having fun. Because the game cant be that someone - it can only provide the playground, as it already does. Inviting your friends to come there, will always be up to you. Sure, the playground could always do with more slides and swings and a better sandbox - but getting together will always be up to the players. And if you dont feel like putting in that effort right now with all the toys available... I doubt a new toy, even one thats locked behind "you need so many friends online at the same time", is going to make that any easier.