Barbs do tremendous damage - why? they get 4 slots for weapons and 2 of them are 2 handers. All of these bonuses apply while equipped on the Barb.
How to make this balanced for other classes that don’t need Barb carry to do any end level content?
Simple - open up weapon slots for the other classes. Then they will have more access to benefits and builds of aspects on these additional weapon slots.
This also would be more in line with how D2 plays - which is exactly how D4 should be built.
I’m usually against this idea, but let’s brainstorm for Blizzard.
D2 is about to be a quarter-century old. Get over it. The nostalgia is just embarrassing at this point. I’m not saying there aren’t things about D2 that are better, but Blizzard is never going to make a new game just like D2.
Anyway about your post - the incoming +1% dmg/8 main stat and +1% dmg/9 main stat for other classes is literally the least they could do and barely scratches the issue. I definitely think that more is needed and yeah, the easiest is an equal number of stat sticks. Could even be reasonably justified, like let pretty much everyone equip a dagger “for close-quarters, self defense.” Doesn’t matter that I’ll never attack with it (even if I choose to use a dagger as my actual attacking weapon, anyway!) It’s about the stats and aspect.
I like this… me go bling bling mode 
I believe they stated more than once that they wanted to get the other classes class specials up to the powerlevel of the barb, dunno what happend to that.
if the rumors are true then the barb will be buried in season5 .
and in that case the announcement to bring the other classes to the power level of the barb is maybe more of a threat than a promise.
but for the druid it’s probably still a buff, so i’m optimistic about season 5. 
i like this, but armor pieces do no damage, so a 2H Mace for every Werewolf Companion would be fine. 
Hm… On second thought, maybe too OP. Lets tone it down to 1H weapon plus Infinity Gauntlet that can imprint 5 affixes.
Well, all other classes are getting a baseline damage buff. Barbarian is getting nerfs while other classes are getting buffs. Will hopefully get everyone into the same neighborhood at least.
Barbarian is already balanced around their Arsenal Weapon system. You are complaining because Bash and Flay were busted in S4 and on the PTR with Third Blade Deathblow and Rupture were equally broken. Never mind the fact the PTR does not reflect the ENORMOUS nerf to all Keystone Passives.
Non-Meta Barbarian builds (which is everything except for Bash, Flay, and S5 Deathblow/Rupture), fall behind other classes or in line. You do not have Brawling Barbarians, Frenzy, Lunging Strike, or any Core Skills Barbarians outshining and outclassing people. On top of their already fairly low performance, Hemmhorage is getting capped and the Keystones are getting obliterated.
S5 should definitely have barb more in line, judging from the nerfs and buffs to other classes we’ve heard about so far. But will it be enough? Will it be too much? I guess we’ll find out in a week and a bit
I am a barb main so I’m more than a little worried. But the unique changes give me a tiny bit of hope
10/10. Best idea ever
Take a look on the barbarien builds this season?
Which builds was viable without using the gushing wounds / crit. damage exploit?
They fixed gushing wounds in season 5. So i don’t think barb will be the top predator in season 5.
unless of course they have done something else dirty with the uniques, that nobody knows yet.
Direct bash wasn’t too bad either but doesn’t compare to bleed builds. And bash temper has been nerfed in s5 so that’s not looking promising
The Arsenal mechanic is a Barb thing only. They won’t give that (or close to it) to other classes. Keep ideating though.
Yes, the bonuses apply but they are 1/2 or less a buff than a rogues 2 hand for instance. The barbs damage comes from very high strength and some buffs obviously either don’t work the way blizz thought they would or were just flat too high.
Don’t forget, they also get to cap armor with their primary stat so that they don’t need it anywhere else in their build.
They already addressed this in the PTR with main stats
Thats is not correct.
Barb needs 1 GA Armor Roll to cap armor.
But i’m not sure yet, if they have to masterwork that armor piece with GA armor roll or not for reaching armor cap.
And they need elemental resistance rolls on their gear to cap elemental resistances. They can’t do it only with gem on the jewelry as some other class do it.
Barb = 1 weapon per fury!
It’s ok, I stopped explaining barb stats to people now, the hate will never stop anyways why even bother lol
Nowadays I pretend I am a sorc main and join the whining see if anyone came up with some new insults. It is kinda fun!