I can't think any other reason for banning tire warmers than having some "excitement" and passing after pit stops when drivers have to go on the track with cold tires.
Now I hope they can get rid of the two compound tire rule in the race, let's say make it optional? Also they should get rid off the heavy load qualifying session and really start sorting out drivers on based on best times and not fuel tactics. Would make qualifying much more interesting because you'd see absolute results, now you can only guess who is running heavy and who is not.
Standard components sounds a bit worrying. Cutting cost is also a bit hypocrite, when they have been back and forth changing the rules every second season. Time will tell if F1 stays as the pinnacle of motorsport I guess, doesn't look that good.