Just bring your salinity up with water changes over a few weeks - mix them at 1.030 approx.
I wouldn't add much more live rock to your tank. If I was I would go hunting round some lfs's for small pieces with lots of hitch hikers.
You don't need to bother supplementing Ca at this point. If you want to up your lighting , you might try a PC fixture and have one 10K and a 50:50 or a 20K