...very directional to...
I read your post and looked at the maps several times and eventually pieced together what you meant.
Being "directional to" means the direction to where one sends the most amount of their signal, not the least.
The AM stations that transmit from the Everglades are all directional to the east, where the population is.
I think what you meant was directional away from.
W228BY is directional to the east, the south, and the west, but directional away from the north.
You could also say that W228BY is shielded from, shielded toward, or shielded away from the north.
If the Bar is being rammed by the Bull, the Bull must become less, not more, directional to the north,
perhaps an east-west kidney bean pattern like W284CS has to the west-northwest and east-southeast.
BTW...If the Bar ever does move into Downtown WPB, it would in effect become a new station,
as when 104.3 moved to Miami, and their format would very likely change to something totally different.