Variance in player skill is hurting FFXIV's itemization design.

[Granyala]

The next content update will make it obsolete, why make it i230, not dyable and not upgradeable? I don't get it.
._.

I think they view Mhach gear as a catch-up measure to speed people along until they get either lore 230s which they can upgrade or until they get savage raid loot.
Same is probably true with the Nidhogg weapons, though these are in a bit of an awkward position, considering you have to clear extreme mode to get them.

There is no gap, By the time most raiders are close to being 240, welfare city comes out and everyone can be 240 in a matter of weeks. There is only an illusion of any gap and it's at the raider's expense.

But that is not a problem with the rewards themselves.
It's a problem with horrible raid loot RNG and lockouts.

This can easily be fixed by increasing the speed at which raiders gain loot, so they they are 240 by the time "welfare city" hits the streets.
BTW, at one piece of gear a week it takes 3 months to upgrade to 240.