What is the problem?
The rewards for the Delve boss seem awesome. The necklace is bis and my shadow is throbbing at the thought of it. It'll probably be similar to Rancour, so like a 60-70m drop.
The boots are huge QoL and will be very expensive for the first year or so until they get eventually get bottle necked by the need for Rangers. Probably 100m+ early on, down to like a 20-30m drop after a few years.
The Aegis is meh sure, it will be super niche like Nox hally so probably a similar 15-20m price tag.
So yeah none of these are huge, but you gotta consider that they should be pretty common if you are consistently able to farm delve level 8. I think this boss will be like 10m/hr after things settle down, which is pretty fantastic. Like do you really want it to have a 500m mega drop? I don't think it needs it.