those bug's that you listed arnt really that bad.
and isnt the gorefast zig zagging intended?
think of it this way
you're on foundry and you're on the top level of the map
The gorefast is all the way at the bottom ( near the human spawn )
You start shooting at him and he goes all f-ing retarded and its seriously the most annoying thing ever
and its not like its normal movements at all
its like changing strafe directions left to right really fast
and it looks almost as bad as cs1.6 where the animations just "teleport" the players head left to right because the model is being horizontally flipped
every time it happens I hear somebody on ventrilo say "f-ing strafing gorefast!!!"
but then again this is easily overlooked and you can continue enjoying the game BUT sometimes when a lot of these problems occur frequently and somtimes together
that's what I call "rage material"
-unrelated problem-
One time I remember ( while ago ) when me and a friend were on office trying to get our suicidal achievement on office for the first time
WAVE 9 - no fleshpounds
WAVE 10 - three fleshpounds spawn simultaneously and go into a "cluster f*ck"
one of the fleshpounds ends up "teleporting" right behind us...
we were able to clutch the situation and went on to beat patriarch.
LUCKILY we didn't get the achievement because the game decided not to give it to us just for sh1ts and giggles