Time wise you might be right. I think the benefit of skipping the STS release
would be that there is more time to backport critical driver/software pieces
during the points at which Rubén would have been working on STS releases. It
wouldn't bring out the LTS releases sooner though. In fact by my thinking the
LTS releases would come out much later. That would provide more time to
polish the LTS release.
I think there are other benefits to basing a distribution only off the LTS
releases. This said I don't see any of this happening. Rubén said he was
actually personally in favor of this idea although the problem with it is
that there are a lot of people who would jump ship either way. Frequent
releases brings in new users and helps 'market' it. Although that said I
think the 'market' part could still be accomplished simply by releasing STS
releases based on the LTS release + backports and still have the same
'marketing' effect.
How would skipping 12.10 even work? I don't think thats an option. I think
Rubén said that wasn't going to happen either.