So in short, you don't like what you've seen from this short RDM clip because it makes no indication of tanking? You are talking about an attention grabbing RDM in a console version of the game, and this is an mmo where DPS and healers need to focus on NOT grabbing the attention of mobs. It is also really too bad that you didn't play RDM in XI, because you would have a massive amount of appreciation for the thought that has gone into this job for XIV if you did. I think SE knows they really effed up that job in XI, and have put a lot of thought into correcting that mistake.
You are too blind to see that in this very short video we see style that is unique to this game. No class/job weaves in and out of ranged/melee DPS. RDM not only does this, it also weaves in and out of casting magic and doing melee damage. From the video, we are guaranteed that the job not only does ranged DPS, but also gets up close and personal with the target to do melee damage.
Here is what I see in the video as the RDM commences battle:
Magic attack 1 [magic damage]
Magic attack 2 [magic damage]
Instant cast MA [magic damage] - very similar looking to BLM's Scathe
Tether to mob [melee damage] as indicated by Fencer's thrust animation
2x sword attacks [melee damage]
Flips back [melee damage] as indicated by cross slash animation during backflip that they slow down to make sure you don't miss it (how could you not drool at this)
Finisher [huge magic damage] animation very reminiscent to flarestar from FF IX.
Count them up, and even view the video to verify. 8 gcds are used, and are evenly spread 4x magic damage, 4x melee damage, and this RDM does it in STYLE.
You might have discounted that when the RDM weaves in and out of caster/melee range, they still cause melee damage. I haven't played all the jobs in this game past 30, but as of now, I am currently unaware of any job in this game that actually causes damage when it changes stances.
It is easy to come to the conclusion that players such as yourself enlighten others to the fact that there is no satisfying every gamer out there. Nostalgia, and a past oriented mind makes it impossible to introduce a class or job that lives up to your expectations. I personally wanted RDM to be another healer to compete with SCH, yet I am still giving this job every opportunity to be something really fun and awesome to play, instead of looking for every window to paint it black.