You seem to be assuming that not adding character slots means no new content. Several characters from Melee were replaced from Melee to Brawl, I'm assuming the same will happen here, which could increase roster replacements as much if not more than increased slots. Heck they could replace all 35 or whatever characters in Brawl or whatever with only 30 all-new characters, and I don't think anyone wouldn't call that "no new content". An increase of 5 slots total, with 5 replacements a la Mewtwo-to-Lucario is what I'd expect.
For patches I'm not talking about glitches, I'm talking about the alteration of techniques and basic game properties to "balance" the characters. Hypothetically, if the Warlock Punch is deemed too powerful/broken/whatever and it's nerfed to half it's original power a la Capcom, then suddenly the HRC WR strat is basically impossible to match. I see why that would be a good thing for versus, but not for us Stadium players, yes I know nobody cares about Stadium but it still makes Trek sad.

Yes I'm old fashioned.