I'd be fairly sure, (but obviously can't prove it as I haven't seen your data from the surveys you've quoted), that getting home/to work/where ever is priority number one.
Do I need to know it's a signal passed at danger? No.
Will it change anything if I do? No.
I'm fifty something lapsed teenage spotter, who now uses the railway for business a lot, (at least until March 2020). I just need to know when, and how to get where I'm going.
IMHO the ones who want to know the detail are very much at the niche end, spotter level.
This is where things go wrong, IMV. You say you don’t want detail, but you also say getting where you want to go is the priority. A big source of conflict is when people want to know how long a delay is likely to last, which is something staff often cannot answer, in the absence of a crystal ball. Worse is if a member of staff tries to be helpful and gives an estimate, and it turns out to be wrong, this is one sure-fire way to aggrieve many.
Best give as much detail as to what’s going on, which equips people to make an informed judgement on their options, the more regular users will have experience and be able to factor this in to their decision. Information empowers people to take ownership of a bad situation, it makes them feel more in control of the situation, which is better all round.
It’s also worth adding that for those on the autistic spectrum, even quite minor disruption can quickly cause overload to happen. Again information if presented in the most accessible manner possible can go some way to calming this. By contrast, short fob-offs are likely to make things worse.