Locke's mom isn't dead.

But the four stated here definitely have daddy issues. With Ben and Locke, we know the story all too well. The tension between Michael and Walt somehow got resolved and they learned to genuinely care for each other yes, but there's still a lot of work to do (plus off the island Walt don't wish to see Michael as far as we know from FFs) Aaron, if he grows up alright off the island without some tragic early death, will probably come to a point questioning the absence of his bio. father or will have problems with the father figure present to him.

It's more about fathers, than mothers to me.

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"Bear...? Is that you?"-- Hurley S03E4