Matrix models get hideous quickly: if your event is aimed at a small audience (say, your peers in engineering / education) all is well and whatever you have to say will likely be relevant to them and you will have the ability to spam them without extra approvals. Going beyond that (all of engineering, or all of education) will eventually require an increasingly complex review/approval process, exacerbating problem #2, so on and so forth. Even from the outside we can clearly see the growing bureaucracy.

I don’t think this is an engineering problem, unfortunately, and I don’t think there are any nice clean models for how to do this right – other than splitting the company up into semi-autonomous units that run like hell but will occasionally compete (SAIC had been a prime example of this, with different business units literally in a bidding war with one another for govt. contracts!), this is the price of growth.