I'll share a case against the current NN framework, even if I don't wholly buy it.
First of all, this vote is factually about giving the government less regulatory power by reclassifying ISPs under Title 1. The legal basis for Net Neutrality under Title II allows the government to dictate prices and essentially regulate ISPs like they do water or electric utilities. Obviously ISPs would prefer to not have this axe swinging over their heads.
> The government currently says that ISP's must treat internet traffic equally. This is a good thing and is hardly micromanaging.
It's a matter of opinion whether this is a good thing. One counter-argument is that it limits the size of the menu that ISPs can offer. My parents, for example, want fast home Internet access but do not watch streaming video. However home ISPs cannot offer downgraded video, so my parents must pay more.
Zero-rated ("free streaming") music - blatantly non-NN - is another argument. Obviously people like streaming music for free. NN proponents think this makes it hard for startups to compete with deep-pocketed established players. But this does not seem to be happening: lots and lots of services, both big and small, are now zero-rated on popular plans.
> The internet should really be nothing more than a dumb pipe.
Well, maybe it shouldn't. Applications have different needs: twitch games want low latency, streaming services want high bandwidth, overnight downloads can have low priority, etc. If you had a knob that controlled your Internet latency, wouldn't you use it?
But even if you believe it should be dumb, is it proper to declare that ISPs are natural monopolies and therefore ought to be regulated aggressively under Title II? Or is it better to apply a light touch and find ways to encourage competition, under the premise that competitive markets are more consumer-friendly? The recent upheavals in the mobile telecom market (led by T-Mobile) show that established players can be more vulnerable than they look.
I think basically we don't know. The most compelling arguments for NN are all hypothetical, because we have been living under a NN regime so far.