What is the point of having MI and Signal assets inside of a Brigade Engineer Battalion?

I know right. I understand that the Army wants each BCT to have MI and Signal Assets, and I understand why they would lump them in the same battalion. The only thing I don't understand is why would you have them lumped in under Engineers? Of all the insane ideas I've seen in the Army this makes absolute no sense.

As part of a BEB, sir, I've personally seen my intelligence company being deployed downrange as attachments to the infantry battalions and the like from our brigade. While the execution of deploying a MICO to support units downrange is nominal, I have heard multiple times, and seen the effects, of the engineer mindset towards the intelligence company while back at home station, and it isn't pretty. The issue that I believe is the true reasoning for the question posed, sir, is why do BEB's not have the proper knowledge, equipment, or resources to train their MICO or Commo CO's properly? And why are BEB command teams neglecting such powerful assets?

Not being specific, but from personal experience, I've heard that the most I'll learn while being stationed at a BEB as intelligence is "how to be a very skilled 10-level soldier" in reference to many things like being on details, working in the motorpool, or doing battle drills. While there isn't an issue at honing these skills, the issue that's been noted is that while stationed here as a first assignment, most intelligence soldiers leave as NCO's who are only proficient in being soldiers; not intelligence professionals.

"Why do BEB's not have the proper knowledge, equipment, or resources to train their MICO or Commo CO's properly?" As a former BN S3 of a BSTB, I was an AR officer, the CDR was AR, the XO was SC, and the CSM was IN. The expertise for the readiness posture of the MiCo, SigCo, CBT EN Co, MP PLT, and CBRNE PLT on MOS proficiency came from the Co CDRs with mentorship from the BDE S2, BDE S6, and BDE EN. Providing a training environment, resources, and equipment is a basic staff function that a competent BN and BDE leadership and staff can provide regardless of their background.

"And why are BEB command teams neglecting such powerful assets?" Sounds like a unique problem of the BEB and BCT leadership you experienced firsthand. I've observed BSTB CDRs that were IN, AR, FA, EN, and SC; I suspect other branches filled that role. The BEB is a true EN BN commanded by EN; they are depending on BDE staff to take lead on employing the BDE Enablers which is what the MiCo and SigCo are for the BDE. My Co CDRs educated me on what they needed in order to succeed in their duties from schooling requirements, training venues, and equipment/personnel readiness. There is no reason for skilled MI/SC officers and NCOs not to be able to train their soldiers on 10/20/30 level MOS specific tasks.
Hope your experience in the BEB improves as you interact with different leaders over time.

I'm disappointed the Army stood down BSTBs in favor of EN BNs. The failure of the Army assigning true "01A" Officers from MFE "combat arms" notwithstanding. The Army needs to do better with creating MOSs that fit. If they can do a "01B" for MFE only, we should be able to do a 'no-MFE' MOS pulled only from OS.
As a point of comparison, what does OSS do for BSBs? Is it 01A, or do you think it is only pulled from the MOSs that comprise their subordinate elements?
Heck, the Army's new shiny toy the I2CEWS got an MOS of 01G - Commander, XO, S3 have to be from the MOSs which comprise their mission areas.

MAJ (Join to see) BDEs had EN BNs before BSTBs. It’s more about rectifying a mistake that lasted less than a decade. When Stryker BCTs were formed it took a few years to open those slots to non-Infantry officers.