I think you just need to sit back and give everything time. I know you are bummed. Trust me, I get it.
When I first got my sense, I was excited about it as well. Running around the house trying to track things down. Labeling. Questioning every move it made. But 2.5 years later and having had my own experiences and watching many others here on the forums - time is your friend.
You have had amazing detection in your first 2 weeks. But now just let things settle for a while. If a new device pops up, great! Leave it be unless you really know what it is. Use the “is a guess” toggle on a label if you aren’t sure.
Changing your water heater may have changed things in your home. I know you say it is wired the exact same way, but wired the same way to your eyes and wired the same way in life may not match. The factory could have used a different batch of heating elements. Sure it is a 3500w heating element, but that batch actually pulls 3450w, or there is a bad solder on a circuit board causing a tiny bit more resistance, there for changing the way Sense is able to detect it. Who knows.
In short, who knows what is going on, but I think you need to stop taking every initial detection as a final “its got it its perfect” and every missed detection as “its stopped working, the sky is falling”.
If a device truly stops getting detected for several weeks and no more triggers. Then maybe it is time to write support, or delete the device and give Sense a chance to find it anew. But you need to give it time.
I know you are disappointed with Sense’s support response. Ryan has given some indication about why they can take time to respond. There is a lot to look at in a support ticket and I doubt all the CS reps are trained to the level some of your requests require. I know there are people out there who think that Sense shouldn’t be selling this product if they can’t support it in the way that people think they should be able to. My generic response to get in touch with your ISP’s support and see how that goes. Or your Bank for that matter. Many of these multi-million dollar companies don’t offer 24 hour support, or at least not support that can actually help you. Heck, try getting in touch with Google about a Gmail issue.
I hope you know I"m not picking on your or attacking you, but so many of your posts are always at the extreme of “it works perfect its great and amazing”, or it isn’t exactly as you expect it to be therefore it is terrible.
As to what you can expect in the future - Every user here has a different experience.
We all have our own expectations of what we want the device to do.
We all have different living residences with different electrical properties and appliance combinations.
So I don’t think there is an easy answer as to what you can expect at your home.
The only thing I can say is that currently, as of today, I would not expect your Sense to accurately detect all the devices in your home all the time. I would expect it to detect some things, but not others. I expect that to change next week when its not colder than Mars and your heat strips aren’t running all day long.
I expect in the summer time your detection to change because your AC units (if you have them) will introduce a whole new world of “noise” into your house.
If you are happy enough with the unit, keep it and get from it what you can.
If all this irregularity is going to drive you a bit nutty, pull the plug and return it. I’m sort of assuming you are still in the 30 day return window (and they have been good about extending that in some cases if you are out).
I agree, it is a shame they don’t have the resources to get Sense to the product we all wish and know it can be. I’m sure they wish they had the resources to pour into development and customer service to make it continue to get better, but I believe they are doing what they can.
So try to take a break from the Sense for a couple days and let it do its thing.
There’s better things to be bummed about, such as being a Rams fan on Sunday. [I joke, I joke]