There is a good bit of land scape and enviroment variability. You just have to travel there.
The small stones problem is partially enviromental. Go to the Creeping or whispering woods and they are littered everywhere, while they are less prevelant in other areas. Just as certain trees / plants / animals / mobs / ores are regional.
Developing the habit of carryig 10 stones and picking them up when you see them generally fixes the issue.
Having low strength definatly makes this harder ! but that is all part of the stat and equipment/ talent choices which have consequences mentality of the game. As the tank I would carry 20 stones for the party of 4 to compensate for the weaker allies.. Again, the game is group oriented highlighting how diversity of allies is valuble.
As a past solo mage I feel the pain, but even back then was able to keep 10 stones on me when adventuring... I just didant get to keep as much loot as everyone else XD.
The cliffs are very intentional. Probably to guide player movement to make it more predictable for other players to set up ambushes - like bandits- and further encourage group actions for defense and offense. We had a teleport spell that you could use to go over mountains... it was patched fast, repeatedly, and hard. You can still go up and down some of the cliffs if you know the trick, but is a hassle.
Right click attacks are your friend.
There is a modest amount of player support from players via the wiki and the forum. We were hoping that Gamigo would pick up the work and make it all shiny and nice... they have not yet... Mostly people are unwilling to look, which is sad.