For what it's worth, which is probably very little, I think Girard actually has quite a bit of room to grow as a player. It's a little unusual b/c I feel like we tend to get more excited about guys like Guerrier where you can see they have impressive athletic attributes to go along with some basketball skill.
Girard is kind of the other way around: heavy on skill with a little bit more limited athleticism (or, if you'd prefer, physical attributes -- he's not getting taller and unlikely to ever be a blow-by guy). But having said that, I think we're looking at a kid who could be a really good passer. Not sure he's on an MCW/Rautins level there but he's already more creative, IMO, than a guy like Buddy and probably a more effective passer than Triche or Frank Howard, who despite all the criticism of the latter, both ended up in the top 10 for career assists (though Triche never averaged more than 3.6/game -- Girard already averaged 3.5 apg last season).
The way Girard moves the ball creates opportunities. He looks to push tempo and has that skill of seeing passes many other guys don't. I only expect this to improve.
I also think he can be a more effective shooter. Not sure he'll be a 40%+ 3-pt guy any time soon since we don't run an offense that creates the types of looks for him that guys like JJ Reddick and Trajon Langdon feasted on at Duke and because he's handling the ball most of the game. But that doesn't mean he can't increase his efficiency (he shot .324 from deep last season) and I think he'll start to potentially make a few more of those deep bombs, which can really open things up for the interior guys.
I'm also intrigued by how he'll develop as a scorer inside the 3-point line. We saw buddy add that little turnaround jumper last season and while it doesn't make him the most dangerous offensive player we've seen, it's certainly something allowed him to add a little variety to his game and up his scoring output. Girard, IMO, is quicker and perhaps a little craftier in there. Not sure he'll ever do much at the rim, but I could see him come back with a little floater and some other deliveries in there to increase his output. Think that could be very interesting.
Anyway, think those factors plus improving a bit defensively could make him a much better player even if the general output is somewhat similar.