I would recommend spraying some lube into the lock cylinder, if you haven't already, to maybe prevent it from wearing (maybe use the new key more too ??) and it will probably help with how the new key works as well. I haven't driven the car all winter so I'm not totally sure, but the steering/key lock seems a be lot more positive than it was before as well. I should have taken more time to see how that all interacts with the lock cylinder, but was in a bit of a rush again.

I'm not really worried about the EWS, I think it's pretty reliable and only rarely gives trouble and then it's usually because of a battery/charging issue that knocks it out of synch.

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)