This has probably been asked for a lot, but i would really like to have some training dummies added to the major cities.
I dont know what other players do, but i personally dont really like relying on sims and stuff like that to determine the best rotation or build setup, and would rather experiment and test stuff myself.
I have been trying to test stuff out in dungeons and on raid bosses, but dungeon bosses just implode as soon as people touch them due to the juiced player damage in sod (with some exceptions), and there are too many variables in play when it comes to testing stuff on raid bosses if you are just trying to see if a change in your rotation will provide a slight dps increase.
So basically, please add some training dummies.