I had a question, can you destroy a square of barrier like a normal square of blocking? If so if a square of barrier is destroyed, do you replace it with debris as you do when blocking is destroyed, and would that debris piece clear with the rest of the barrier?

Barrier tokens are blocking terrain, period. The only difference between a barrier token and the brown bordered squares on the map is the barrier tokens are not actually printed on the map (obviously ... kind of hard to remove them, otherwise).


So any rule of game effect that is concerned with blocking terrain would treat Barrier tokens exactly the same as it would the brown bordered squares.

The Player's Guide makes it explicit:

Blocking terrain markers can be destroyed as per the rules for destroying blocking terrain. They would be replaced with rubble tokens when destroyed. The rubble tokens are removed from the game the same time that the normal blocking terrain markers are removed from the game.

The text should probably be changed to "debris tokens" instead of "rubble tokens".