802.3ad on 5N2 - What's the point?

I was excited to see new support for 802.3ad aggregation, and since my router supports it, and I connect through a 2.5Gb port to my 10Gb switch, I expected to see an improvement in throughput. Nope. Still capped at 112MB/s, like it was through the old dual port protocol, and in fact, almost the same as the 5N was.

Why add real port aggregation finally, if the throughput won’t see an improvement? What a disappointment.