Wahoo have upgraded me to a KICKR V5. 
First try last night, so far so good. I did feel like you had to “try harder” than when on the Core but I think other have mentioned that. Fingers crossed my experience will be positive. After 3 failed Cores I think I earned the upgrade.
Good luck! Hope it’s a keeper for you. 
Yeah, the Kickr has a heavier flywheel (16lbs vs 12lbs), so that is likely what you are feeling. Related to that, even if you use a power meter for data, doing a new FTP test is likely worthwhile. That change in flywheel inertia can show in some tests, so I’d suggest doing one reasonably soon.
I have made the decision to ditch power for outside so have just sold my PM. So to take away the confusion this is now my only source of power, as you say doing an FTP test is certainly worthwhile too. I think the Core may have read a bit high but I’ll do some good riding over the next few weeks then test.
After a rather tense exchange at the LBS I was issued a refund, as Elite and the distributor between them seem unable to locate/provide a new Suito. I was offered a Direto XR at retail difference; as they wouldn’t do it at cost difference (despite the delay), I took the (begrudgingly) offered refund.
Not impressed with Elite/Madison at all.
Sorted then 
I had a nice email from Garmin apologising and assuring me it was a glitch and they will be sorting it out and learning lessons… so hopefully they will.
What direct drive trainer you have Chad?
I have 3:
Kickr 17, my main one in use for a nearly 2 years, since I started using the InsideRide E-Flex designed for it.
Saris H2, which I used for a long time before swapping to the Kickr.
Neo 2, which I used for a while when testing between the 3 to see what I liked most. Its dedicated to my wife’s station at this point.
out of those 3 which one would you buy again? I’m getting a DD from Santa (not sure why my kinetic road machine is bomb proof) but can’t make up my mind. Kind of weighing up between saris h3 and new kickr…
Pretty simple. Go to spin class and do that dancing thing on a bike. May not make you faster but you can make a tiktok video.
Seriously, if I have issues I’ll use the stationary bike and HR until it’s fixed.