I'm not saying that there is something wrong with trying to make more money out of individually sold items.
You said your picked at stacks sold too slowly in comparison to whole stacks.
But then you added that you had raised the individual unit price of stacks that had been "picked at".
Raising the price would not have helped them sell any faster.
Hence the "fuel on the fire".
I do understand the points people have made in favour of the current system regarding the economy and preventing people from flooding the market with specific items.
As a player playing a game for fun though, I'd prefer the option to buy and sell individually from stacks.