I'll try my best as I have a 2015 V6 AWD Ultimate:
1) No lighted sills
2) Yes - no issue day or night - you can change brightness and colors too. Only issue is you can't really see it if you use polarized sunglasses (no way to avoid as the HUD is really just a reflection on the windshield).
3) Yes - Homelink buttons on rearview mirror has nothing to do with Bluelink - they're transmitters.
4) Radio is great. Sirius loses sat signal every now and then - but does that in every car I've ever driven with Sirius.
5) You get 1 year free trial for Connected Care (enhanced roadside assistance, etc.,) with Purchase, 3 month trial for remote access (start, unlock, etc.,) and Guidance packages. See below for what you get and pricing:
6) Have not played much with Nav, but I think you might be able to do that - Others should have more experience to answer this one!
7) I have not had any issue so far, but have not used it too much.
8) Works fine with the radio, climate, etc., for me. Also works great with the built in Siri Eyes Free if you have an iPhone!