Same here, I like your Elves and Orcs. Your elves sound a lot like what I've been toying with, except they also had a background similar to the infamous Halfling origin in Dark Sun.
This is my take on Dwarves in an attempt to not create Scottish midget coal miners.
Dwarves: Dwarves are a proud, self-reliant race. Independence is one of the defining traits of their culture, along with a focus on resourcefulness and practicality. They consider themselves apart from other races, acknowledging their beliefs but not sharing them. Dwarves principally follow an animalism/ancestor worshipping religion, they build considerable "Tombs" for their families, but do not bury their dead in these places, instead life sized statues, precisely detailed, stand in honour of the deceased.
Due to an earlier period of nomadism, the body of a revered ancestor is holy and cannot be simply left where thieves could rob it.
Dwarves practice scrimshaw, skinning and in cases where the oldest of a clan dies, cannibalism. They believe that by carrying with them every day the parts of their dead family members the spirit watches them and provides guidance. Such is their respect for the dead opposing factions will gladly turnover the bodies of their enemies to ensure that the spirit of the ancestor is not bound to haunt them, burning or destroying a body is the most unforgivable act in their society and will result in the offender being considered an abomination disguised as a dwarf. It is customary to take the skin as a sign of victory. The wearing of a Dwarf skin is a mark of respect for one's enemies as the wearer is choosing to shield themselves with something they trust to protect them. The respect accorded to a skinned enemy is such that wearing it when interacting with the deceased's relatives is considered to be one of the highest compliments one dwarf can make to another, to own a dwarf skin and not wear it when facing its kin is a grave insult.
This obsession with the body parts of kin is fanned by what is referred to as "The Curse", a degenerative disease where a dwarf is born with some or in the case of several rare bloodlines, all of their limbs unformed. As the dwarf grows up, muscles, tendons and nerves that belong in that limb form but the skin and bone does not grow. In some cases this could simply be a missing digit, nose or ear, but in extreme cases the dwarf could be born a head and torso with genitals, but lack most of the features of their face. The curse also denotes are high degree of pain resistance and propensity for magic. These 3 traits of the curse are the cause for the commonality of clockwerk prosthesis in Dwarven society. The ability to endure pain and the magical aura allow for better construction, manipulation and maintenance of dwarven prosthetics.
Dwarven settlements are either permanent, in the case of their cities and giant farming collectives or temporary such as the mines and various timber camps that exist to feed the industrial development of the Dwarf cities. Several underground cities exists but they were founded by breakaway factions and outcasts of mainstream dwarven society. Dwarven trade is aimed at making the most amount of profit for Dwarfkind. Amongst themselves this results in an honest conduct in commerce and stabilized economy, when dealing with non-dwarves this results in complicated contracts stipulating very specifically what the dwarf is and is not providing the customer eg the fulfilment of an order for 3 tons of smelted steel, but not the delivery of the steel to the customer.
Amongst the farming collectives, mines and timber camps that exist to feed the factory filled cities, this meticulous approach to commerce is often waived in lieu of maintaining good relations with groups that could potentially raid the settlement. Rural dwarfs don't care about what coloured skin/scales/fur their neighbours have, just as long as they can be made dependant on dwarven products and dwarven goodwill.
Although the mainstream of dwarven society is oriented towards ancestor worship, an animism religion is quite common amongst rural dwarves that will offer praise to various animal spirits in addition to "Those Who Stood Before". This sect is treated with respect and tolerance as its leading figures still acknowledge the primacy of the ancestors and that most rural workers are either adherents or sympathize with sect, alienating them might result in civil conflict which would leave the cities dangerously close to famine, both in terms of food and raw materials.
Dwarves speak a variant of common they claim to be the origin of Common, from their intense interspecies trading. It is almost similar however the speaker's voice rises at the end of their sentence as if they were asking question. Swearing is common and considered a skill for one to develop, it allows for peers to determine superiority by dint of who is capable of the most explicit swearing. Dwarves will often bestow nicknames on each other, the most common being the shortening of the dwarf's first name to the first 3-4 letters ending on a vowel and the adding of -zza, or ending on a consonant and adding -o.
TL;DR Steve Irwin
impersonators who are profit driven and have a bizarre fetish for their dead, and many of them are cyborgs.