I think the online form submission allows for what seems to have happened -- a direct communication with the area supervisor -- which probably pulls a lot more weight than customer service forwarding a slip of paper that could get lost in transit or have illegible information.
Umm.... While that could be the case, I'm not sure if you've ever seen what sort of garbled messages a passionate user base writes when asked on an Internet form. I read responses like that on a regular basis and have to play Sherlock Holmes with what I get half the time. My going theory is because everyone has different vocabulary and typing skills alongside different perceptions of both their experience and what is being requested of them. Not saying @Crunchewy falls into that category at all, but more the park is taking that chance.
But, if they could have gotten ahold of someone while still in the park to talk to, and they handle the write-up, I'll guarantee it's both a better customer experience with documentation more likely to be understood by management... Plus possibly allows for a more timely response by management.
As for the secondary operators booth and ride space near it - isn't that why there's giant mirrors on the fence so a secondary operator isn't needed? Still sounds like poor scanning to me. I get it, humans make mistakes, but there should be a way to ensure the entire ride area on this kind of ride is entirely visible to the controls operator.