Even in the middle of winter you'll find the temps quite nice (mid 20s), and perfect for cragging.
El Chorro is amazing but a lot of the easier routes are super polished while there are mostly harder grades on the less polished routes. Nice campsite there tho.
If I was going back again I'd just fly straigt into Benidorm/Alicante and hang out in that region: the whole area around Sella through to Calpe is amazing, with tons of crags - more than enough for several months of constant climbing.