I don't like this thread too much, mainly because we shouldn't focus on games PS should take ideas from, but rather on ideas, wherever you might find them. PS team has followed great examples and it has also come up with plenty of good ideas on its own and that's how it should be.
That said, instead of trying to keep the status quo, I believe old players and devs should pay attention to stuff people repeat over and over again (even if in non-challant ways). It's obvious that "regular" items (non-magical items like helms for example or donkey like mounts) should be bought and not quested for. Status items (magical, rare and finely trained animals) should be quested as they're usually only available to some circles.
It's important to notice that PS is a frustrating game for people who are starting and don't have the patience/objective to be begging things from Guilds and rich people. You can take one or two months playing without getting anywhere. Without a way to reward new players, PS won't get above 50 players at the same time... Because those are the only ones who connected right away with someone and felt it would be worth to stay here despite the hassle.
Most of PS's "visible" implementations (Glyphs, Armours, Mounts, etc.) are available only to these resistant players and not to 90% of the new players in their first week playing. My advice: instead of making 2 unreachable mounts, make 1 unreachable mount and one commercial mount.
And this is an idea you see very often in other games, where they actually expect to have a player base and not a fan/antifan base.