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Crosstalk Reduction

Here's a couple of questions I have received recently
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I have a question regarding crosstalk between data cables in a bundle. It is my understanding that cable cross-talk is potentially greater when cables in a bundle lie parallel to each other, and lie in the closest possible bundle configuration. However, data center installers like to install the cable in this very 'neat' configuration for aesthetics and space savings. Is there any way to reduce this crosstak (besides using a better cable). For example, I noticed that the four twisted pairs in data cable are also twisted around each other. Could the entire bundle of data cable be twisted to improve cross-talk performance?
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Hi
I am a certified cabling designer and Installer.
I have a question. I tried but failed to find a good answer. Can you help me.

I was discussing with a friend of mine who is in the same field as me.

The horizontal cables when entering in the MDF/IDF room should be combed parallel to each other or not. Should they be left mingled and sorted when they are near the patch panel? Should it be combed and all the cables from false ceiling to the entering the cabinet be combed for aesthetic reason. Or it should remain mingled as the UTP cables are twisted inside their jackets.

I believe combing the UTP cables and make them run in parallel to each other may produce noise or some other distortion in the transmit or receive of signals.