Sooo, in short, both Orcs as well as Uruks - as seen in the movies - are completely off from the lore? (I read the books like 20 years ago) 
PJ's Orcs and Uruks are absolutely fine; it's just PJ's interpretation of their breeding process that's stupid. Don't misquote me.
So the scene where the PJ invented Lurtz for instance, spawns out of "black magic" right out of the soil/mud is completely made up? I wonder if that has something to do with story telling on screen, as in, there wouldnt be any cleaver way to move along in the story if Saurman had to wait 20 years for his breed to reach "useable" fighting age? "20 years later" would probably make the story seem less "flowing" on screen..
Yes, that scene is awful, and it's definitely not essential for the story to move on. The fact that Saruman had Uruks not afraid of daylight could have been told in many other ways, and told more elegant and realistic. SEE is about realism, right?
In my opinion PJ made an astonishing beautiful movie. Though there are a few flaws, that don't change the overall genius of PJ's work - but even we're both fans of that movie, we would detract from it's beauty if we can't acknowledge those few flaws.
Anyway, I'm not sure if we should venture into this as it would render Orc pits useless ...
It would not render the orc-pit useless, but a few simple alterations would definitely make it much more realistic:
- Remove the corpses floating around in the mud-soup, and the orc with the stick churning the soup.
- Replace the texture of the soup with say a texture of wooden planks, and disable the rotation animation.
Voilà. It can even be done in simple coding (hiding of sub-objects in the various levels). Of course a little tinkering with the model is preferable, like raising the wooden floor, and whatever.
A note on
realism:
Even without considering the problem of orc-breeding, the orc-pit (as it is now) is a disaster in terms of realism. The structure is a crater filled with a very liquid mud-soup, still it has some openings at the bottom allowing the orcs to
run out of the structure. Now, what to me seems complete unrealistic,
why the hell does the mud-soup not run out from those openings at the bottom, just as fast as a scared orc can run??
... we'd have to find a way to use female orcs (and uruks?) which would raise the question of female dwarves, elves and men as well.
Female orcs are not important (it was mostly a joke
)... female warriors were only characteristic for the Elves, and especially the Easterlings!
off-topic:
Every faction would need a "love chack" 
Not in this game. I only know one RTS game where this is implemented, and in fact works very well.
The Vikings is a game much like
The Settlers (I believe it's made by the same people) ... beautiful graphics and nice, cozy gameplay. Really recommended!
