Having browsed through this thread, I'm a little bit puzzled now
To me, it seems that I have to play a different version of C3C than most of the others. Ok, let me explain...
I've quit to play C3C two weeks ago, since in the 6 epic games (all on huge archipelagos) which I had played so far, I had to learn that my attacks wouldn't pay off.
The last (very frustrating) example was this:
Having SoZ and Knigths Templar, I built an army consisting of Ancient Cavalry, Crusaders, Knights, and Pikemen (and lots of workers). A surprise attack on the Babylonians made me conquer two of their cities (don't remember the names, let's call them A and B), one next to my harbor on their continent, one some tiles away in the middle of the land (B).
Next, I tried to rush towards the third Babylonian city (C) and created a fortress on the only hill next (two tiles away) to this city. All the other tiles were just grassland, nothing else. At this fortress, I had 18 Ancient Cavalry and Crusaders, 5 Pikemen, 2 Trebuchets and some Longbowmen. The fortress was linked to city (A) - having barracks for quick recovery - by roads.
Out of a sudden, the Babylonians showed up with 4 different stacks of Swordmen, a total of 31 (and all of them just regulars!) of them, obviously all of them heading towards city (B). Since they just walked by my fortress, I planned to wear down their troops a little bit. So, I attacked them with my 18 attack units (all of them being at least veterans, some even elite), after my trebuchets had bombarded them. After the battle was over, I had lost 16 of my attackers, with just 2 Ancient Cavalry who had retreated successfully from the battle still living. The Babylonians still had 26 Swordmen, now most of them being veterans or even elite.
So, I lost 16 attackers with attack value of 3 or 5 with the defenders (defence value 2) just loosing 5 units.
Similar experiences I had to make at all the other epic games as well

This is just the one which really made me become abstinent of playing C3C any more...
So, it seems that combat calculations in C3C had changed from they way they took place in PTW, anyway.
To me, it seems that the defense bonus of the terrain is taken into account in a very different manner, now.
For that, I am really eager to have this patch really soon. I have no problem with loosing a "stronger" unit versus a "weaker" one - from time to time. This adds some taste to the game.
What I really hate is when I plan an attack and the §="§$%! RNG just kills my units away.
Please, guys... release this patch ASAP!!!! :tank: