D&D 5E Feat that grants Fly

[Yaarel]

If there is a level-4 feat that grants Fly 15 (Hover), in terms of optimization, would you take it?

 

[aco175]

What is the context? Is it just for some races that have some sort of flight already or open to say, my halfling thief. Does he need to grow wings to something. If nothing changes, I guess just flying at 4th level would be worth it.

Does flight speed lessen if you are wearing armor or heavy encumbered? Might make it less optimal for a fighter or something.