I hope it's hidden in the patch notes somewhere, but one of the seeming bugs I did notice in my fairly limited play time was that a couple of times my advancing units caught the opposing sides highest HQ unit (the on-map boss of whatever the correct terminology is). This HQ unit (with nothing else around it) proceeded on both occasions to tie down large numbers of my troops with a seemingly unbreakable defense, in one case literally tying down two regiments.
map66, this should happen much less often, since it's been addressed on two levels.
One, the engine has been improved so that the HQs do not "lead the charges", so in the new patch you will rarely or almost never see HQs ahead of it subordinates (of course, movement-direction-wise), on all echelon levels.
Two, the fire rates, kill rates, footprints, visibility calculations and many other things have been double-checked and tweaked for greater realism.