My idea is that each character still has their own individual paragon levels but the inherent bonuses are account-wide and are based on an accumulative "Account Paragon" total. These bonuses will affect each character created within that given league, but each individual character is still capped at P100.
Note: they don't include the main stats character's receive on their journey to P100.
- -Account P0 > P100: The existing 300% MF/GF bonuses (now account wide)
-Account P150: +5% Movement Speed, +2 yards to Gold Pickup Radius
-Account P200: +50% MF/GF on top of cap
-Account P250: +5% Movement Speed, +2 yards to Gold Pickup Radius
-Account P300: +50% MF/GF on top of cap
-Account P350: +5% Movement Speed, +2 yards to Gold Pickup Radius
-Account P400: Greatly increased Legendary Drop chance for Bosses/Goblins
-Account P450: +5% Movement Speed, +2 yards to Gold Pickup Radius
-Account P500: +100% MF/GF, +5% Movement Speed, Cosmetic Bonuses
So for a player to get the maximum Account bonus they would need 5 x P100 characters in that given league. This means that players won't feel gimped by playing alts and will rather actually be encouraged to roll numerous characters and level them individually to obtain the Account bonuses.
Full P500 Account bonuses to each character in given league;
Edit: As many have pointed out a bonus to Pickup Radius can actually be detrimental to some builds, so I have changed the bonus to Gold Pickup Radius.