This resource now has 2 patches for you to choose from.
The first one makes bombs explode in a 3x3 radius instead of a cross-shape.
After I posted the original resource, Benox approached me and had rewritten my original 3x3 bomb explosion radius patch to not use any freespace.

He also made a new version of the code which makes bomb explosions more similar to vanilla but act way smarter - if the bomb is in the middle of a tile, it will act like vanilla, but if it is on the edge, it will destroy blocks 1 tile over.
This way, if the player wants to precisely bomb they can still place the bomb in the middle of the tile and it will break blocks in a cross shape, but if they place the bomb right in between two tiles it will break both of them instead of just 1 like vanilla would have done.

If it sounds confusing, just download it and try it yourself. I am uploading both versions here.

FOR THE GIFS BELOW:
THE FIRST ONE IS 3x3 BOMB EXPLOSION, THE SECOND ONE IS SMART BOMBS.