@SmartHomePrimer @ymerj thanks for not jumping down my throat. I'm not trying to argue, just bring more conversation which will ultimately put more eyes on this topic 
While this is not for HA users and is for HE users, it requires the use of setting up and maintaining HA, which will then make these people users of both. Which there is nothing wrong with, I'm currently a user of both and have been for a while.
The purpose of my post was not to try to convince anybody to abandon HE to switch to HA. In fact, as a current user of both, I feel the setup to really be a "best of both worlds" scenario. Sure once you're on HA you can setup ZHA, Zwave JS, etc.. etc.. but if you already have a HE hub, I would ask the same question of "why?". HE has great radios, support for most zwave/zigbee devices, and overall they're quite stable.
Once you've setup HA alongside HE and become a user of both, why wouldn't one want to take advantage of the strengths of both? HE definitely has strengths over HA like I mentioned with the radios. HA definitely has strengths over HE as far as hardware capabilities and frontend design. And for automations, just browse through the node-red post to see countless stories of faster automation response once offloading the automations onto another piece of hardware. (@SmartHomePrimer yes I'm a node-red user too).
I guess my point, it was said there's a hope to attract the advanced user with lots of HA experience. That advanced user who will see this will likely have that same reaction as I and be concerned that the HE hub may not be able to handle everything HA throws at it. I may be wrong, but my C5 struggled at times to keep up with handling automations for 100 some devices. I just took a look, I've got 1,098 entities on HA. I think if I tried to load that all onto my HE hub it would grow a set of arms and slap me in the face LOL (Is there anybody with 1000+ devices on one hub?)
Having that ability to decide what the HE hub actually brings in would be at the top of my list. If that happens, I would happily bring over some of those entities to help test things out. Like I said, I do see the purpose of this and a use-case for those one-off integrations that just aren't supported by HE. Ultimately though, as people get comfortable maintaining both I envision a lot of these users will start thinking "hmmm maybe I'll try one of those fancy dashboards" or "hey look, I can easily setup that node-red thingy from that topic with 4,000+ posts over here, maybe I'll try it" and then all of a sudden they've started going in the opposite direction.
I swear, both this integration and Jason's custom component over on HA are going to be like gateway drugs. You start off with these and before you know it you wakeup on the floor of a server room with a usb cable coming out of your arm hahaha