Tested it with my modded 40Kmod+Rosgima (the modded part is the maxviewdistance that i reduced from the default 60 to 30, and adjusted all the visibilityAtDay and visibilityAtDark accordingly for all units , as in default mod and expansion would go up to 120 )
With my Rhino (it's a normal ground transport, i mean it get you to start on turn 1) i got into a fight with an Ork wagon that saw a lot of grenades thrown my way.
Couldn't see the other differences as in that map my Rhino had spawned right next the Ork vehicle, so everyone was nearly already at weapon range of each other.
Seems like BrutalAI ignore the "turnAIUseGrenade" setting (that i had set up high as i wanted to see how the AI navigate with the Brutal AI)
Now on a medium UFO landing, i sent my Drop Pods (it's a transport that only have you landing and starting on turn 2, meaning turn 1 is AI only).
And it seems the BrutalAI gets stuck on that turn 1 "Hidden Movement", the game regularly freeze and unfreeze, sometime i can hear a door, but after near of a dozen of minute the turn 1 is still not resolved.
With the regular OXCE 7.8 , that fight works correctly so it seems the way the Drop Pods transport works put a huge strain on the BrutalAI
EDIT : gave a try with the newer version of BrutalAI (as i noticed there was one newer than the one i downloaded yesterday).
And this time it works.
I reloaded and retried the save i did multiple time and there is no more problem, the AI only turn 1 always complete this time , that's great tough i have no idea what was wrong previously.
EDIT 2 : completed that medium UFO battle and it was quite intense as i didn't had to move all over the map to find enemies (Night Raptors chaos marines), they were flying and running around my troops, attacking when they could (when my troops weren't shooting them down as i was using rather strong units and weaponry) .
There's only the case of the UFO that had 4 enemies in it and that stayed inside for the whole duration of the battle.
It wasn't a problem as it got me into a nice assault , but i wonder if it was normal that some AI were staying in the ship because apparently the doors were on the 2nd floor instead of the 1st one as in most classic ships :
I just made my own entrance by destroying a wall personnally and killed them all.
edit 3 : oh damn after checking the options i noticed BrutalAI was OFF :/ as i was testing with the save on and off and forgot at some point to turn it on again
i guess that intense battle was only played with normal AI then, must have been lucky to have the enemies spawning close to my landing zone then :/
Will have to test further