Well, it'd make more people happy than if it was Subaru though, but that's still not everyone. I WOULD like that though, EXE and SS Rock have some really nice potential for awesome movesets what with all their chips/cars and transformations. For example, for his lv3 Subaru can Tribe On to Berserk and use his Thunderbolt Blade, then Double Tribe with Shinobi/Dinosaur and use their special attack, and finish it with Tribe King and its Kaiser Delta Breaker (or if he's the only remaining member of his team he could do stuff with Rogue tribe/noise); EXE could do something with Beast Out or the Master Style PA, or even a temporary power up with Saito/Hub.bat or something.
Have you played Onimusha: Blade Warriors?
You could use different styles, homing charge shot and slice with a Sword chip. ^^;
I think his point is that it won't make people happy because many people hate EXE/SS series with passion.