These Darius buffs are nice, but really isn't satisfying for the Darius player, but stressful

The new changes give Darius bonus mana refund on each successful dunk, all the way to a full refund and his full reset back.

What is the problem with this?

The Darius player feels rushed to hit 16 as soon as possible in order to reach his full potential and actually attempt to carry and help his team out.

Darius can't use his ult pre 16 to secure kills or he risks his ult going on CD, this wouldn't be a problem if his kit didn't completely revolve around his ultimate.

The community was honestly talking about a recast change to Darius's ult which in a sense would give a full reset, but not to the same target.

It would go something like this:

Darius leaps to champion, dealing true damage. If Darius scores the kill, his ult fully refreshes BUT cannot be used on the same target for 120/100/0 seconds, cdr affects the first 2 levels.

Basically, he would have his current ult, he could dunk his laner, go back to lane with ult up, BUT HE CANT DUNK THEM UNTIL THE 120 TIMER IS UP.

But in that time he can go dunk the mid laner, and at rank 3 he would have his full refresh.

Is this really such a bad idea? Wouldn't this have helped him more than now?