Lived in Broadford in the 70's. I used to return there frequently over the years to visit friends. Nice place to live. It has all the basics for a good community, church, primary schools, secondary schools, community centre, gaelscoil, shops, pubs...True, Superquinn is in decline - I think it might be feeling the pinch from Dundrum Centre - and I would guess that they may develop the land for apt's. But on the plus side I hear that LIDL are moving into the old Glaxo place opposite Marlay Park. (Perhaps others can confirm this). As regards the distance to the LUAS it is a good walk to the Balally stop - but only a short cycle!
If I had the means I wouldn't hesitate buying there. Best of Luck.