It doesn't seem as though this deck has a particularly big finisher. Beating down with Leovold can work, but what if another deck just "does something bigger" than what you can handle (i.e Inferno Titan). Even if you can't trump a card like that wouldn't it be good to have something that beats down for more than 3 or has evasion? I just worry about giving my opponent too much time to chump block while trying to find a solution to your Snap + good stuff wall.
This is the fundamental problem with these decks. They lose to the dumber things that can happen in games of Vintage.
As a matter of course, you simply accept that you're going to lose the 10-15% of games your opponent "Vintages" you, but you're going to crush them at an 80% clip in the rest of the games (which works out to a pretty solid 60-70% win rate). I'm notorious for playing these games against @Samoht , and winning 1/2 tight games (since he's very good), and getting Vintage'd in a 3rd game.
What I think lots of players hate about these decks is that you cede control of a lot of games entirely, in the way that Shops does. If your opponent has the nuts, you are often fully defenseless, and you're going to sit there with the Bob you cast on turn 2 off your two lands as your opponent does things they should only do in private with Paradoxical Outcomes on their third turn.