Well, what you said 1st is probably the #1 reason why so many fans are high on him.
Shannon is also more likely to be inserted in the game because he can still have an effect on the crowd. Even though he didn't play well in the past two games, Shannon is more likely to dunk the ball then Sasha which of course will make the audience more likely to jump out of their seats. Playing at home is supposed to be an advantage, and the crowd will sometimes not be into it. Sasha can still make the crowd excited except for him he's not going to go in for a dunk or make a spectacular play. The only thing that will get them excited is when he his a three, especially at a critical moment.
It's also been shown that Shannon can play better with the starters than Sasha has shown so far. If the bench is all out there at once, they'll look like [expletive], but with some of the starters in the game at the same time, the play is usually better. When Sasha is inserted with the starters, he's more likely to foul, pass up a good look, or take a shot. Sasha handles the ball at times but I personally think he should just be spotting up and taking wide open shots only.
Shannon has done well with the starters and sometimes looks like he could start in place of Fisher, Im not blind to it. I wont tell you Shannon sucks at everything as many fans want me to say. haha. And when Sasha is with the starters, Sasha does exactly the 2nd thing you said, he wont shoot. In garbage time, he's basically like "[expletive] it, why does it matter?" and just shooting random [expletive]. But when the games on the line, he isnt as aggressive, something that last year, he was sometimes too much of.
I remember Real Deal pointing out last year that he had waaay too much confidence, and that was why he shot so much and tried to do things he didnt have to, when his role was to just shoot. Then he fell into what he is now, a zero confidence player fighting for a role he once safely had. Ive always enjoyed drama like that though, a player who once had all the fans loving him, then losing them, and having to fight back for them. Hopefully it ends the way I, and hopefully many other fans, want...