What I like about Smashville (and even better, Town & City) is how the platforms extend past the stage itself. This offers quite a bit when it comes to recovery, and although Sonic's recovery is good, this is still a nice extra option that we gain. This also helps opponents with weaker recoveries out, as stated above.
One thing I want to focus on is how these platforms help us in one situation of the
MU. Whenever Rosalina & Luma rapid Jab by the ledge, instead of waiting for an opportunity to get up or Spin Charging to the other side of the stage, we now have the option to wait for the platform to extend across the stage, and retreat to that.
Another thing throughout all match ups that I like about the platforms (again, Town & City does this better) is how we can easily and quickly land on these platforms after a Spin Dash Jump, allowing us to use shield again.
Suppose we go against
or
, characters who love having Sonic above them. Most of the time, whenever a Sonic player confirms Spin Dash or Charge on the opponent's shield, they Spin Dash Jump. These two along with other characters are able to punish this with an Uair or Bair. If we're able to land on these platforms, then our shield beats these options. The only thing we really have to worry about is if they decide to jump on the platform to grab or if they use a command grab.
The last thing about the platform extension in this stage (again, Town & City is good for this too..) is that whenever we get the lead, we can camp on the platform. This can be a risky deal, as we're closer to the blast zone thus increasing the chances of dying earlier than usual. However, our opponent has to jump after us if they want to go for that, and the tables can turn from there as we have the ability to shield and they don't.
The problem with this is that other characters can exploit this if they have the lead, particularly
,
,
, and
who can use it to charge their best specials (Limit, Fart, Aura Sphere, Needles). There's other characters that can take advantage of this, like
and
, who want to have that lead to force Sonic to approach rather than have them approach themselves.
Overall, I believe this stage is good for Sonic, granted I believe that is the case for every character in the game. I usually prefer Town & City over this stage for the reasons above.