Gentlemen, this is how we fix Sonic.

He said the boost meter could possibly slowly recharge, or you could use rings to boost the recharge process. Also a boost limit does NOT go against sonic's style. Sonic can reach top speed just by running, but is allowed instant top speed with this boost meter... hmm... sounds familiar Remember those little boxes with the shoes that made you have top speed constantly? Yeah, same concept here. Except you don't have to wait to find a box.

He said it'd go up by rings, but rings don't come back once picked up...

And the shoes put you above top speed if I remember right. Not sure how they worked, exactly, but I'm sure it has something to do with rings or chaos emeralds.