[dfox]

I think that largest problem with Event Log is overreliance on structure. Often you have one particular log record that you know is the problem, but no idea what it means because you have some generic event code and bunch of meaningless structured data.

Freeform text logs usually contain more detail as to what exactly happened.

[geographomics]

That's not a limitation of the Event Log system itself, as you can easily write freeform text in the message rather than building it up with localised strings and structured data, e.g. https://msdn.microsoft.com/en-us/library/6w20x90k(v=vs.110)....