Again, as this has been asked quite alot to be implemented, I propose that
more races to have variety of elements to be used in creation of an unique
character. Giants have that to some degree, why no other races since it would
suit them so well and easily enrich the playability of certain races.
And without the need for new races which are also on wishlists of several I
think.

Trolls - There should be water/swamp trolls, stone trolls, some smaller troll
race that would be able to perform magic a tiny bit better than normal idiot
trolls. If there ever comes shaman guild or such, it would be suited for such.

Orcs - Variety of orcs exist, atleast in popular fantasy epics, Uruk-hais,
olog-hais etc. These races vary in size, intelligence and everything. Smaller
orc races could be more agile but not as tough as the larger orcs. Different
natural armour, hp/con ratios, size, str, wis, everything.

Elves - As most of us should know, elves are not just elves, there are
varieties even though we already have drows and elves. Same as in above,
couple different elves to choose from, grey elves, wood elves, high elves as
they are most commonly used. Wood elves would gain skills to aid them as
rangers, abilities to blend into the forests, where as high elves would not
gain these, but rather be inclined to gain them from guilds by training, being
more proficient in magic than stealth and fighting.

the same goes to numerous races, even if they would not have different
subspecies, atleast randomize their stats, just a bit, the change focused by
your background, so that a nomad minotaur wouldnt get a boost to intelligence
and wisdom just to lose size and strength. Also, make certain races have lower
charisma maximum, even if you are the prettiest troll of your race you still
count as hideous by elves in comparison.