Ninja'd my own post.. haha!
<This is by no means comprehensive, I only skimmed 18 pages, and not well. Please add new ideas or anything you remember that I have missed.>
Features that have been mentioned:
--Sort by variant
--Sort by game type (PPSC, WTA)
--Sort by presstype (gunboat, public, full)
--Sort by anon/non-anon
--Sort by 1v1's, or non-1v1's, or game size (e.g. all 7 player variants), game family (all classic variations, all Known World games once the full suite is completed, etc.)
--Include a timestamp for game finish on the player record page (or game finish ID describing which order games finished. Since score is calculated by game finish rather than the start, the current ID for games can't be used to list one player's score changes relative to another player. The idea behind this timestamp or finish ID is so that some of us enterprising numbers junkies can compare historical scores between players through time using Excel or something.)
--Max rating achieved (mine is 1260 and better than my current 1183, which would place me 6th in the current rankings so I'm curious how it compares to everyone else's all time best) Kaner mentioned having a separate table maybe?
--Monthly or quarterly standings (who killed it in February 2013 and who tanked?)
--Option for unranked games (whether implemented by Oli, the mods, or by anyone at game creation) to allow special rules games or horribly butchered games because of abnormalities (giant CD's never filled) or obscene instances of metagaming to be removed from the rankings if needed/desired.
--Another nice feature (dunno how hard it is to code) would be to be able click a game and see the changes for every player in that game (kinda like how we see the D points changes per player currently in the game's finished pages).
On a side note, how are non-default win conditions, CD's, new players, banned players, games given away or filled after CD etc, currently handled?
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Other scoring systems or statistics or metrics that have been mentioned:
--Devonian's proposed scoring system (For reference, his proposal was on 1-9-2013, and is on the first page of this thread. Some recent discussion as well)
--Did Decima L. and Yebellz have separate ratings proposals as well different from the current system and Devonian's system? I haven't paid close attention to the recent discussions here on the subject.
--A side by side modification to current rating normalized based on country performance and listed as a separate statistic.
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Some possible metrics (NOT RANKING SYSTEMS in and of themselves, in otherwords not related to W/D/S/L, but possibly interesting statistics to track and possibly useful in other rating systems?):
--Total supply centers held across all games. This is an indicator of some form of skill (not necessarily directly correlated with ability to draw/win games), but a player who consistently controls large number of SC's is probably fairly skilled.
--Alternatively, or related to the previous metric, an average power ranking based purely on SC count at the end of games
--Average time of defeat (For instance in WTA, there is information of value in how early a player was defeated, someone consistently defeated early isn't likely a good player, but someone whose defeats are consistently much later in games has a much better chance of being around in a draw)
--Share of a draw (while meaningless in terms of game outcome) is still information that speaks to the skill of a player. Often a 1 SC player bargaining chip vs the player who was going to solo but got forced into a draw. Both ended up with the same result (and rightly so in the current ranking system), but these statistics could potentially be useful in other ranking or rating systems.
Input of an alternate scoring system needed...
to its winner (who had a rating of 1000 
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