Interesting that Ooler’s weighted blanket felt hot to you even with the unit 
.
87F for me would be very high but it is not simple to compare because I’ve learnt that this device is hugely dependent on ambient temperatures. Do you have it set to a fixed 87F throughout the night?
When I got the device, I set up fancy schedules to start LO and then ramp up continuously. The graph looked nice. I slept scrunched in a ball not daring to move as it was so cold (I saw 49C on the device). I’ve since realised that too cold is not ideal, just as too hot is terrible, and now I have it super cold for when I fall asleep (the colder the better), but that this is bad after a few hours, at which point just below ambient works well. And the less temperature changes the better - because then you can adjust on the fly, and the change will hold for a good amount of time until the next scheduled change.
I’ve always felt like if the Ooler could react to your body temperature, rather than go through fixed presets influenced by ambient temps, that could be a game changer. But credit to the device for changing my sleep, it has been life changing.
I have ordered two different weighted blankets, will drop a review in here at some point.