I think Tressel definitely has a say in what happens with the uniforms, but he's also practical. From what the O-Zone post says, the changes likely won't be anything more substantial than the pants changes that OSU made for 2005.
I mean, what was mentioned? Stripe changes, piping, DRI-FIT and moving the shoulder numbers down the sleeve.
Stripes are the one thing that have been messed with throughout the years as the team switches manufacturers. DRI-FIT is pretty much a functional change, a la the pants switch last year or the Revolution helmets. Moving numbers to the sleeve would be a major change, but unlikely according to the poster. Only thing to worry about would be the piping, which hopefully is not adopted.