The items items during the undertaking of those tasks are normal trash or greens, which translate into credits more than anything else. There are some rare chances at blues and/or purples, but it's not a guarantee like giving +comms would be. Also, comms are multi-use and are much more useful than the random blues you find (which often get vendored/gtn'ed)
Valor is not gain from any of the above mentioned activities either, it is social assuming you are in a group (and not in space). So actually, +exp, +credits, +social would be more appropriate per medal.
Quests, missions, FPs give you credit, xp, items as reward. In the process you get credit, xp, items.
So it's only consistent if you make medals give comms, credits, xp, valor.