They're not reading them, and I don't blame them for that. If I were in their position I wouldn't really care about MP after the direction the game took.
But what is improvable and should be done is spending those 5 minutes to just drop a message saying: 'We are busy with SP bug/crash fixes, we have changes planned to combat & balance but won't be coming in months until SP is more polished' or 'We know there's feedback but we don't plan on doing any changes to combat & balance as we consider it fine'. Just anything really, let us know, takes a few minutes max.
(Just updated a bit further of my personal feedback on my thread,
here)