It is important for your business.
When your team members gain leadership status it benefits you extremely well.
You receive extra AVP and that can hep you gain a higher leadership rank. It increases your commissions and it increases your down line.
Remember that you earn commissions up to the 12th level in your down line, depending on your leadership rank.
Therefore, encourage your EA's to become team leaders, not only for your benefit but for theirs as well.