I love the demanding that all of these suggestions be added to the next patch. Like BioWare has a magic wand they can wave and suddenly it's done!
To be specific on my opinions on these three points:
#1: I don't think this would necessarily be bad, but I also do not think it would really do any good. Situational awareness and communication would still far surpass anything added to the HUD.
#2: I think four quickslots is the right amount. Many kits have overlapping skills, so the devs have to find a careful balance between giving you variety and still making each ability you choose matter. Each build is unique and interesting. I do not think it has to do with console ports, honestly. It's the same reason that we are capped at level 20 for each class.
#3: Oh this is silly. The multiplayer is meant to fit into the story of single-player. The lore is that these are unknown specialists working behind the scenes at the behest of the Inquisitor and his council. They are actual characters with a bit of back story, and are actually woven into War Table missions and lore. In fact, you can see them in Skyhold as well. What you are asking BioWare to do is change a bunch of character lore and War Table missions plus remove character models from Skyhold just to satisfy you wanting a female this or a male that.
Instead of these, I personally would like more bug fixes, new characters, new maps, and balance changes.