The guy whose house we rented also played La Torre while we were there, and he prefers it to Roda (plus it's cheaper as you say). I only got the chance to play one course so I chose Roda as we were in Los Alcazares (altho nearer Los Negros we thought as we were so close to the 525), and I wanted to see the Calidona style layout etc. In saying that, La Torre is nearer completion so I reckon Roda will look better in a year or so. It was my own fauly for not mentioning Corvera when booking, but the deal with the lunch was probably as good value.
We actually hired a car and drove all around Murcia, and visited La Torre (for curiousity). It does look very good and very well presented as a resort. And because it's so big, it will be very self inclusive - particularly for people with no cars and who don't want/need to leave their resort. Whilst snooping, one lad doing his snag let us in to se his apartment in La Torre.
But we are obviously hoping the alleged quality of the course at Corvera, plus the facilities will attract a more golf holiday style tourist who probably will be hiring a car and will pay the extra.
I hope to be back again before the end of the year and will do another check all around the area for updates. In the meantime I'll keep myself updated from this site.