I am relatively new here (see above), so with all due respect to the more experienced members my own view is that:
a) The ability to acquire 1 foil by trading in 4 non-foil cards should be removed
b) The S card lottery urgently needs to be fixed with S cards made available in merchant boosters and the crazy prices of certain Hunters and Rise of Saruman S cards reset to an appropriate level
but that:
c) singles should still be available for sale/purchase in the merchant;
d) all existing MyC collections should be left as they are - ie no reset of My Cards.
To explain, I cannot find a single reason given so far on this discussion that would justify a reset. The two complaints are that
(1) Some players who have won the S lottery have too much gold.
(2) Those players allegedly slow the site by mass opening of boosters
From what I have seen so far, complaint (2) is wholly speculative, in both its aspects. Game play lags - fact. The merchant never seems to. That is inconsistent with the idea that merchant activity is to blame for the lag. Noone knows whether mass booster opening coincides with lag - it is speculation. The gameplay lagged particularly badly for many hours during week commencing 28.10.13; the notion that someone(S) was mass opening boosters during that entire lag period seems fanciful imho. If (and unless) someone in a position to verify it (ie MarcinS) agrees, (2) justifies nothing. So we are left with (1).
As to a) and b) above: The problem that UPC identifies in his OP (of some having too much gold, ie complaint (1)) is caused not by singles trading in MyC but by the S card lottery. The way to fix this is to remove the lottery.
The ability to buy foils seems undesireable, for several reasons. First, a foil should be a real find, one that is pulled from a booster, or won as a prize in a tournament, not simply "bought" by "wealthy" players. Second, the foiling system means that a MyC player interested in foiling is looking for 16 copies of each card, not 4. This, combined with the S card lottery, causes hyper-inflation of prices of popular rares, placing their purchase beyond the reach of many, if not most, MyC players.
These two issues are related. The huge amount of gold injected by each S lottery "win" unbalances the merchant's design equilibrium. The lottery winner can spend huge amounts of gold on foiling, or simply buying cards, thereby driving up prices and denuding the merchant of its stock.
c) and d) above: Even if some MyC players have all the cards, MyC is NOT the same as All Cards. Certain leagues/tournaments are only open to MyC players. The MyC players form a subset of the gemp community, identified by their interest in collecting cards as well as playing with those cards.
If the singles market is removed, MyC will surely collapse as a playing option. The only players with useful MyC decks will be those who [can] play a lot of leagues/tournaments. Even they will not be able to obtain 4 copies of a given rare except by long (v-e-r-y long) passage of time and many thousands of games played.
In any event, if the collecting aspect of gemp MyC is to be retained, the singles merchant is necessary.
And there seems no point in being able to win/buy boosters unless there is an exchange mechanism, ie the singles merchant. Otherwise, how is anyone interested in collecting MyC to obtain 4 copies of any given rare? What is the point of preventing a player with 6 Aragorn's Bows (after opening, in theory, about 2,250 packs of FotR) from trading 2 of them for Flaming Brands of which he has none?
Voted no to reset.
But the S lottery and the foil purchase system should be fixed/withdrawn respectively.
For what it's worth. Sorry for length.