I'm 99% sure the ID.4 you rode in was a RWD one; hence you weren't impressed with the performance. I'm also not impressed with a RWD ID.4 performance. I would also be very surprised if you bought an EV6 had it not fit your needs. Obviously, different people have different needs. If I were a single guy, I would absolutely consider an EV6. It has plenty of cargo space for one or two people; there is just not enough cargo space for a family going on a long roadtrip.
I'm far from believing that the ID.4 is a vehicle that we would go on long roadtrips in. Maybe weekend-long trips, but that's about it. My son is in ice hockey, so we need a vehicle with the cargo space that can accommodate his large hockey equipment bag and a couple hockey sticks even for in-town driving. When I opened the back of the EV6, it was stunned with how small the cargo area looked. It would be an exercise in acrobatics to fit his hockey bag and two sticks in the back of the EV6.
I had a day-long test drive in the ID.4, and we liked the ride quality except for the anemic acceleration (because it was a RWD one). The cargo-area space looked adequate in the ID.4 for our in-town needs.The ID.4 I'm taking a delivery on soon is an AWD version, which has almost 50% more power than the RWD one.
Unfortunately, it seems like the Model Y is the only EV at this time that has a decent amount of cargo space without going to a $100,000 (or more) option for an EV, which would have a larger cargo area, such as the Model X, a Rivian, or an F-150 Lightning. So, it seems I will be keeping my Model Y instead of trading it in for another EV. If I do get a Fisker Ocean, it will most likely replace the ID.4.