Many diablo II fans complain about the different approach in D3 regarding the skill tree and skill progression, and the depth of the paragon system in general. What I suggest is that instead of each lvl of paragon adding 3 to main stat 1 to each other stats, why not let us choose? It would add some spice, and the "builds" clearly could not be broken since they have already attained lvl 60 and can now focus their skills in a direction they see fit...
Also with the 3% bonus to Magic find, gold find, exp bonus, why not let us choose two of the three? players can then make a gold collecting dmon hunter or Witch Doctor, and an expericne monk orbarb, so they may stack any two or blanace and mix and match whatever combo they'd like!
Note: By stack any two I mean pick 2 of the three bonus we currently get. ex. pgl lvl 1 =3% mf and + 3% gold find... I level up to pgl lvl 2 then I pick the same two again. (this is technically a nerf to bonus's)
Lastly to take it a step further why not add paragon passives... every 10 lvl's add a small/weak but personalizing passive . this would be set up in similar fashion to the followers ( lvl 5 - 10 -15 etc.).
You are the developers here but here are some quick not well thought out examples...
1. Witch doctor...lvl 10 paragon pick one of the two passives A."Blood Flow" you, your pets, and follower gain 2% health or B. "voodoo power" your follower and pets absorb 3% of damage dealt to you while you have a mojo equipped...
2. Demon hunter... lvl 100 paragon final passive A. "Demon Vanguisher" 5% of your vitality damage buff to demons for 30 secs after being hit by a demon or B. "Beast Slayer" + %5 damage to Beasts permanent.
Now some may ask what if I have laready gotten to paragon blah blah blah... well just like the followers... when the patches roll let them assign where the want to en masse, or give them the OPTION to start over at paragon 0 or stay where they are at without access to the passives.
These (most likely simple) changes could add depth and replayability and help promote players to jump classes (which I pesonally find very fun, and keeps the game much more fresh)
Possibly another topic...
Also something cool I thought that could be added to help crafting and promote farming would be the addition of very rare "tomes of stat" example... tome of dexterity drops.. two options... teach to any account bound player +1-5 stat perma added... choose to include it in a crafted piece to get gauranteed +50-350 stat or whatever. You guys do the number crunching. Those are the ideas.
They could easily get people farming and not so much flipping, allow people to make items that feel like they own them.
So those are few things that I think could put this game over the top by keeping things everchangeable (d3) and also allow for a bit more customization to appease the rpg peeps!
What say you?