I wish for a little more clarity on the chart on proving grounds. We don't know if it's "players" or "characters" though you label it as "players"... how would you know without WoWProgress's presumption of same account data. If it's characters, many alts are never needed in heroics as they do professions.
What would be interesting to know is...
- which proving ground causes the most difficulty.
- what percentage of PLAYERS, not characters, never complete proving grounds. That many wow players (not characters) are excluded from content.
- How many alts are no longer played in dungeons as a result.
It's just curious to know the ramifications of the change which of course, we can't know.
Plus the comparison of dps vs. healers vs tanks is misleading since they aren't the same proportion count of players. If those that try and succeeded (we don't know how many tried and failed).
I guess we could say though...
DPS 77.7 / 89.8 = 86.5% of bronze dps tried and did silver.
HEALS 29.7 / 32.7 = 90.1% of bronze healers tried and did silver.
TANKS 27 / 32.8 = 82.3% of bronze tanks tried and did silver.
Approximately 50% of characters go for two roles.