Camera configuration - Should I select an AVCHD interlaced format over MP4?
I will answer only to the 'interlaced' part.
Yes, it's a thing from the past. Deinterlaced video always will be looking worse than progressive. It's like shooting through the cracked lens and then trying to fix the footage on post. In any circumstances don't shoot a scene with chromakey in interlaced mode. I won't go into details but the results will be terrible.
Advantages of 60p: you will always be able to make slow motion; due to less motion blur, it'll be easier to key the footage.