Once again thanks to everybody for reading and commenting upon this crooked topic!
Dashcunning already replied to zechnophobe along the lines I would have used to argue in favor of the bear beating the marauder.
The speed of the goblin: I checked on a save file and indeed it's 2. However the table in pdf format I dl'd somewhere from this forum gives the speed as 3. Since I couldn't look up all 96 units in game, I used this table as a reference. If it has more errors then of course some results may be a little askew as well.
As for the thorn hunter - polar bear issue... a clarification I already presented in the first post:
When I use "3-1" and "3-2" I do NOT mean "team a wins 3 times out of four" or "team a wins 3 times out of 5". I just mean "3-1: I am pretty sure team A wins, however there is some doubt, for example if team B is exceptionally lucky or the grid is very peculiar", "3-2: I think team A wins, however there are so many variables that much deeper calculation would be required and, due to the random aspect of many variables, would still probably not settle the matter once and for all".
Probably the TH-PB match should have been 1-3 rather than 2-3, but I gave the PB as winners anyway so I don't think a correction is really needed.
The tennis jargon is just an analogy, after all this is the KB universe... I do not envision the loser to go showering and think about better tactics after fighting 5 times, I envision one fight to the death with the winner surviving, and only one unit alive after 7 rounds