You would think with the large EADS presence in SVQ it would be better utilised, but it's not; even RYR keep chopping and changing there routes. I live not far (on the border between Cadiz and Seville, and utilise XRY, SVQ, AGP and GIB as necessary to connect with long haul; none of them have the ideal schedule, even AGP.
It's not that many years ago there were direct flights to LHR from SVQ (IB->VY and AGP (IB & BA) - all have sadly gone; and I don't see it changing any time soon.