Replacing Staples Connect Hub with what?

The Staples hub actually supports fewer devices then most of the competitors, so that part should be OK. Since it does have a Lutron antenna, the closest match will be the wink hub. SmartThings has a cloud to cloud Lutron integration, but that would require also buying the Lutron smartbridge and you wouldn’t be able to use the Picos with it.

If you aren’t using any Lutron devices, there are some other options to consider. It really comes down to the exact devices you have and how much stability you require, since the staples hub was always a leader in stability, while getting that stability by providing fewer features than some of the competitors, including SmartThings.

The following thread might be of interest (this is a clickable link):