Depreciation: yes all EVs seem to depreciate, but a lot from the fact that battery capacity was increasing so rapidly (and cost dropping), I think curve is not as bad. Also for a lot of EVs the main “draw” on resell was the EV portion, but with limited range and changing market it made sense they lost value. I have no idea how the current crop of luxury 250 mile range ones will fare, because its hard to tell what 5 years from now the EVs will be like. If I had to guess an I Pace should take less of a long term hit because it both has lots of range, real luxury, and may remain compelling (unlike say a Leaf with 100 mile range).
Consumption: the I Pace has the lowest miles/KWHr of any EV I have owned, even performance ones. But I don’t see it as a flaw, its a “baked in” feature of how it drives and not minimizing weight and detail for “maximum range.” Audio seems to have done the same, and in my opinion with a car like this and big battery its a very good trade off. But if efficiency if your number one concern this may not be it.
Reliability: hard to tell. Remember anyone with issue will post, most will not post to say “all is well.” It’s the news syndrome, you only hear bad stuff, not “no one is dead today.” I have had no real issues outside software and my car was produce in Dec 18 FWIW. Others have reported no issues, and some have had to have theirs bought back. It is a first year production car FWIW. But you will me getting a later production model where some of these issues should have been rolled in.