I think Gunnar's gold glove caliber-defense is what will make it tough for any other Oriole to be more valuable than him over the next few years. And yes, his combination of offense and defense will put him in the AL MVP discussion if he stays healthy.
I'm a cord-cutter, live in Baltimore City, and have used MLB.tv for about 8 years now to watch the O's. Overall, I really like it. But, I think the decision depends more on how you watch TV and personal preferences.
Like others have mentioned, there are ways to get around the blackouts. 99% of the time those workarounds have no issues. But, at least once a year, those workarounds temporarily get blocked and you're completely out of luck. There's been more than one occasion where I had a long day at work, couldn't wait to get home to watch the O's and relax, grabbed some beer from the store on the way home, sat down on the couch - and then ..... nope. Out of luck.
That being said, I like having MLB.tv because I don't really watch enough TV to justify cable and I travel quite frequently for work, so having O's access anywhere is nice. The biggest perk to me though is it's pretty cool to be able to put on a West Coast game in the background after the O's game while I catch up on emails and whatnot, if you're a night owl like me. I've really enjoyed being able to watch full games of Trout, Ohtani, Kershaw, etc as a night cap.
All in all, I think it comes down to personal preference. If you're somebody who only watches the Os and also watches cable or can get a cable bundle that includes Netflix or whatever - I think that probably still makes the most sense. But, if you wanna ditch cable, are okay with some disruptions, or value being able to watch other teams - you'll love MLB.tv.
He will need to be better than .038 ISO, for sure. Maybe not that much better. Brett Butler had an excellent career with a career ISO of about 0.085. Billy Hamilton's career ISO was similar. Butler had a much better hit tool and batting eye than Billy Hamilton; Hamilton was better on defense. Brett Butler with better defense is not a crazy aspiration for EBJ, and that's a hell of a ballplayer.