Probably wall of text is coming.
Sure, there are builds and skill combinations in this game that are way better than the others and that fact needs to be changed by either nerfing overpowered skills/loot combinations or buffing up others. But that's one problem. The other one are you guys.
I have never even once thought of Diablo players to be creative or subtle.If any of you hear about the best build, you will all go into it without thinking. You don't try to discover things by yourself, you don't try other combinations, you don't try to balance between fun and usefulness of your characters' builds. Why would you do that? For fun? But who's playing games for fun nowadays? I get an impression that they are being played just for wasting time.
If there is one thing that this game provides much more than Diablo II, it is opportunity to experiment on different builds, skill combinations or so on. Many of you, probably 99%, consider such skills as Hydra with Mammoth Hydra rune as a trash. Well, it deals 74% weapon damage, attacks slowly and generally seems less useful than other runes. Well, it's probably because of the damage. 74% is not too much, but how about 148%, 222%, 296%? By casting it multiple times with the right frequency (placing is crucial, too) you can make the Hydra attack 3 or 4 times as fast it normally would. And damage it's flame deals stacks, making it quite formidable. While I was beating the Inferno on MP3 first time with my Wizard, this skill saved my butt plenty of times (Belial, damage-reflecting elites etc.). I didn't need Streamers, need to read builds on the internet or anything. All it took me to realize the potential of this skill is my own experiments and usage of internal organ called brain.
I firmly believe that there is more examples of such skills.
Games are form of entertaiment. Games are played for fun. So, if you are complaining about lack of diversity or something like that, why don't you experiment? Sure, your character will probably loose some of it's power, but there is no point of having god-like character that can't even test it's strength, because overpowered build provides no difficulty at all. Without difficulty or challenges, there is no fun in playing. In short, you are stripping your gaming experience from fun.
What I just said is an opinion, and it's not directed towards anyone in particular here. Just a general statement.
Now, all what I said doesn't change the fact thet this game has some mechanics and skills that seriously needs attention (Hello, Blues!). For instance, Demon Hunter's Impale is a joke. 265% weapon damage for a single target, costs 25 hatred, is used by character that is quite vournable. Well, Barbarian has Hammer of The Ancients, 325% weapon damage, area of effect, costs 20 fury (and it increases CC).... Other broken thing is that only maxing CC/CD is the way to go to maximize your DPS. Attack speed was nerfed almost right away, but overpowered CC/CD is OK? That is absurd.
If we are to have diversity, there must be many viable choices. Regarding both skills and loot.