2 weeks in Europe, need your inputs!

My husband and I are planning to travel to Europe in December (probably 11 to 27 Dec) and these are the itineraries I have been drafting in my head. I just want to get some inputs as I may be over planning it.

For context: we are from a tropical country and this is our first time to travel during winter. We have been to Europe before and our priorities this time are to see aurora borealis and to see Christmas markets.

Itinerary 1 (my personal favourite because aside from our priorities, I personally want to visit WWII sites and museums and I want to see Sagrada):
* 11 Dec - Fly to Reykjavik
* 12-16 Dec - Iceland
* 16 Dec - Fly to Berlin
* 17-22 Dec - Berlin (1 day trip to Dresden)
* 22 Dec - Fly to Barcelona
* 23-27 Dec - Barcelona
* 27 Dec - Fly back home

Itinerary 2 (least ideal and this sacrifices Iceland but more cities):
* 11 Dec - Fly to Barcelona
* 12-14 Dec - Barcelona
* 15 Dec - Fly to Lisbon
* 15-19 - Lisbon
* 19 Dec - Fly to Berlin
* 19-24 Dec - Berlin (1 day trip to Dresden)
* 24 Dec - Train to Prague
* 24-27- Prague
* 27 Dec - Fly back home

Itinerary 3 (similar to #1 but replacing Berlin with Prague):
* 11 Dec - Fly to Reykjavik
* 12-16 Dec - Iceland
* 16 Dec - Fly to Prague
* 17-22 Dec - Prague (1 day trip to Dresden)
* 22 Dec - Fly to Barcelona
* 23-27 Dec - Barcelona
* 27 Dec - Fly back home

I am also open to suggestions! Thanks for reading!