beyond clearing the exhaust system of carbon blockage, there's usually no benefit in removing a muffler's baffles .. it just makes the bike louder.
But sometimes the internal shape of the stock muffler's outer shell is similar to the sectional parts of an expansion chamber .. especially the first, long tapered section. I see the maxi muffler might qualify
Such a taper-shaped section (the "diffuser" section) can have an effect on helping to purge the cylinder of residual exhaust gases, similar to what an expansion chamber does. It all depends on how the exhaust's sound waves bounce around inside the pipe.. If removing a baffle assembly results in an empty, open muffler shell where sound waves are no longer killed dead, you've got a chance.
Remove the baffle.. Do some testing with a stopwatch .. see if top speed and/or acceleration improved. .. balance the results against the annoyance of the louder exhaust.