So instead of Merging worlds in a way that would allow most linkshells to stay togeather, ie A into B, A+B into C, A+B-C into D or E, they go with the option that will cause our inactive friends to be flung to the far corners of Eorza...

Just don't assign inactive account to a server until they return, that way they at least have a chance of returning to their previous group, if they server the group ends up on isn't full.