If I had the time and patience, I would try to grow my own rotifers. I've put live rotifers in the tank a couple of times and the response from every coral, from SPS to zoas is dramatic.
I've tried some of the liquid foods as you list, but wasn't impressed. I also have a "feeling" that it fouls the water as much as feed the coral.
I've been using Rod's Coral Blend maybe 2X/week, but my latest SPS seems to have a severe distaste for the stuff (still checking that out).
If true, I will be looking for alternate coral food(s).
I don't spot feed anything anymore, not LPS, not anything. I found myself putting more food in the tank by spot feeding than I do when broadcast feeding.