Nesting sequences in FCP7 is quite simple, this example is for a typical promo edit, with 4 versions that will broadcast throughout the week, Firstly you make your Master Sequence, show in green the the project bin, this will be the first 15 sec of the promo without the " Tonight at 2030" tags on it.
You then create new sequences for each of promo versions, 4 shown here in yellow. In these sequences you drag the Master Promo in to the new TX sequence. Then add the appropriate time caption & voice over to each TX version. You then batch export each sequence and send send to the TX server, put to tape for broadcast etc
Depending on how often the show is broadcast, how many TV Stations it is broadcast on and different timezones i can have up to 50 different TX versions.
Making the promos this way will allow me to make any changes or revisions, (things change such as guest dropping out, updated content or new locations etc..) and those changes will simply ripple through to all the TX versions, all i have to do is re batch export and send to TX.
In FCPX Compound clips sort of work, you can make you master edit , compound it , then copy and paste to all the versions, but if you need to make a change you will have to go through all the TX ver, remember 50 of them, and re paste, with the way the FCPX time line works it will probably collapse in on its self and you would have to re edit the end graphic & voice over. This would be a lot of extra work, about as much as making up all the version in the first place.
Audition, I've not tried this but from what I've seen you would have 1 master with all the version in the audition, so you would export, change the audition, export, change the audition, export, change the audition ( did i mention 50 times), quite a good way of getting in a mess & RSI
Or you could duplicate the master clip for each TX ver and just change the end accordingly , you would then have to make the changes in each version x50!!
The only way would i see to do this is to export the master promo and reimport it into the TX versions, and if changes are needed, re export/import and relink, dose FCPX relink? As far as i can see this is the least time consuming of any of the options, but it still a few more steps than i my current method, added to the lack of batch export, i be in edit all night again!
This is just 1 example of "FCPX dose not fit my work flow" & 1 example of how i use nested sequences. Clearly this is something that not every user would ever have a need for but it is part of my daily workflow.
I have not played with it enough yet but this sounds like yet another thing that roles may help with.
RB