Well for one Bing has no place in a start menu or taskbar search/ cortana,
The suggestions are unwanted and a total turn off ignoring them is not an option they should not be there in the first place nor should bing image of the day or popular now.
If that does not change it is a deal breaker.
To serve uncontrollable suggestions/ content will soon follow serving adds.
I personally wouldn't use a Microsoft account to sign into a computer if you paid me.
If you or anyone else likes it good for y'all
Personal choice has to rule all other defaults if it does not what is the real improvement ?