We kinda already have the 'throw your sword' skill in the two skills where Red Mage effectively launches a series of blades in a single target and aoe attack respectively. We also don't know if our current existing setup does result in Mana returned. But all of these suggestions aren't bad suggestions, they just have to be balanced with what is going on with the Job as a whole, and we do not have the complete picture. There's just off the cuff judging going on about it. We're at level 70 with what will likely get 30 more - so these are great suggestions for say the far off future when skills do get fully revised. I expect more number's tweaking and minor adjustments through the 4.xx series. We also have both gap closer and gap opener off global cooldowns.
As far as Dark Knight goes - that's more akin to Paladin in dichotomy than Red Mage. We don't have any magic based front-line DPS, which will likely be one of the next steps in the job release process. Right now we're equally balanced in the roles if you split them between primary stat (Vit Based, Str Based, Dex Based, Int Based, Mnd Based) at 3 a piece. Which means we may have about five more jobs total to go, if they intend to ultimately maintain this balance. Mystic Knight fits the bill, though, in some regards so does Blue Mage - who has been seen more as the class that casts physical spells. This may fall in line with the motif because a STR based Frontline Caster could very well be up Blue Mage's alley.
Anyways, in summary, I am not saying we can't tweak RDM as necessary to make it feel better. I don't, however expect it's role to change and I'm not as pessimistic as some with it's current melee/magic balance. I've always viewed Red Mage as a mid-range character and this fits the bill. There's no point being bitter and insulting about it, and a lot time is being spent trying to justify something that just boils down to personal bias and preference. It'd be so much simpler to say "I just wanted it this way and that's not what I got." History is not on yours or Duelle's side on this, but it doesn't mean Red Mage can't improve somewhat in that direction. Just don't expect a rewrite and don't dwell in bitterness. That's pointless.