Easy 10
Brain dead MUG SHEEP
I doubt I'll bother unless one of the kids fancies it because I'm guessing prices will be absurd. If you've never been to the baseball and feel you ought to try it out, go to a game in the US instead (if that is ever a possibility). This one will feel more touristy than a Man Utd home game.
Been to 3 games in the states (one at Citi Field in NYC and two at Target Field MN) and I don't expect the games at the London Stadium to compare to that experience of course, as those are proper ballparks. But I'd love to take in a game at London Stadium. Its practically on the doorstep in relative terms so it'd be a bit rude not to, plus I've not been there yet and I'm curious to see how they'd set all this up.
As for it being "touristy" - the atmosphere at baseball is pretty sedate anyway, you don't get the partisan tribal atmosphere of football (except perhaps at the Blue Jays, that place sounds like a bear pit at times). Nope, I'm well up for it, it should make for a top day out. Expect it'll be a 55,000 sellout, hopefully this'll be a huge success and become a regular thing like the NFL games.