The general consensus from topics I've seen in various places about "which raid frames are the best" always has someone bring up Healium and always ends with someone discussing how horrible that addon is.
Just looking at it all I see is some horrid redundancy. Why would you have buttons next to each player's frame with the same spells over and over. Would you really restrict yourself to only using Greater Heal and PW: Shield on your tank and Prayer of Healing on a dps? Would you just put every spell you have in all 15 slots and use them? What if you have more than 15 useful spells to use on a particular raid member (including CDs, heals, dispels, etc)?
If you are just dropping every spell next to a player why not just use Bartender and put up 4 rows of bars with every thing on your spell book on it? Why not macro all your spells to mouse over and use the default raid frames? Why not use an addon like Clique with Grid or the default raid frames? If you have all these spells next to a player's frame do you also have them on your bars as well?
I strive to make my UI have as little redundant information as possible. So in this case, it makes me feel like spells next to player frames + spells in your action bars = too much redundancy imo.
I'm not understanding how these spells are keybound either. Are you supposed to just click what is next to the player frame and it heals them? Keybindings are much quicker to react to than clicking, to me at least.