I have 0 experience with the game and will mostly be playing 2 player with my wife.
I really dislike the idea of the blame token possibly deciding the winner when player 1 and 2 are really close and player 3 or 4 would be dishing out a blame token as well.
If you are going to play this game mostly 2 player (which works fine, do it!)
then the blame mechanism isn't unfair at all. it is simply sending the blame back and forth, but it adds an important location on the board and some strategy.
it is true that in the 8th round some kingmaking can take place. my answer to that is that on the last round everyone not beating the troll gets 1 blame.
I wish that "Blame" was more similar to "Corruption" in LoWD: very useful to acquire but potentially hurtful, with many sources of it but only a few ways to get rid of it.
this is true this would be cool.
Overall I like the mechanism.
Now to your variant, I like the idea of taking a blame to save 1 dice, we call blame - same anyway, so essentially your warrior hid behind a rock and ran away right before the monster attacked you.
I could definitely see myself doing this.