Thank you, thank you, thank you for actually writing a developer diary instead of parroting the marketing promotion! :-) It is SO appreciated to have the first actual dev diary. Now might we have a burg dev diary, captain and champ diaries too please? ;-)
On threat mechanics, what is easier than hit it, threaten it?
The current dynamic provides easy active play for tanks. Run around to build threat on things that don't have enough, do DPS otherwise, budget your big threat skills for critical moments in the fight. It's obvious where your threat stands if you position so DPS is on the other side as the MOB so they turn around, or if you turn on the provided UI target's target--which acts as a provided (albeit gross) threat meter in game (at least it shows the top of the threat table for all the MOBs).
Now if instead you mean that the MOBs will be gaining a more sophisticated AI, such that they'll try to take down healers first regardless of other considerations (necessitating CC), just as we do as players, and if the mêlée MOBs are going to defend the ranged ones by physically blocking players from stopping ranged ones from targeting healers (uh oh, physics), and if MOBs will intelligently CC tanks/other threatening targets to shut up/stop them, such that players have to respond more dynamically to what is going on based upon seeing the MOBs behavior (not watching a UI element, like now), then that sounds great!
[center]Click here for our community [url=https://spreadsheets.google.com/ccc?key=0As1T2ZXLPqhTdE05T21qYklYRFF3emVuM18zTnU0aGc&hl=en]LOTRO store pricelist, conversion rates and pictures[/url], please contribute too![/center]