Quite honestly, while he shares a build and sword and whatever else to the previous two, I don't necessarily think that will lead him to a doom of being a clone of Ike.
Again, back to the Star Fox example. Wolf, even the most unique from Fox, shares moves...but he still plays COMPLETELY different. That's kind of how I see Chrom.
While any swordsmen will swipe or stab or what have you, there are a few moves that I am imagining that I think might be pretty cool.
There's that one cutscene of the fight between Chrom and Lucina at Arena Ferox. He jumps into the air, and then spins around a he descends at an angle. If they made that his UP B (similar to Aether) it would still be different enough, at least to the degree that Ness and Lucas differ in their PK Fire. Make Chrom come down at an angle. Or make it a side special in a similar vein to Meta Knight except in the fashion he spins in the cutscene. (I'll be totally honest, as a Chrom advocate, this probably sounds way cooler to me, and probably looks way cooler to me the way my imagination is picturing it)
I know Chrom gets hate, but I think the idea of him sharing moves shouldn't be made out to be a Ridley sized issue. If he plays differently, then he'll still be a decent character in my opinion. I mean hey, I don't want an Ike clone. If that's the case, I'd rather just play as Ike. I think there is material to make him different from the other two, and yes, I do think he'll be in the game as playable. I don't want him to be a clone, and I will be upset if he's a complete clone, but if he's on the same level as Wolf is to Fox, or Lucas is to Ness, then I would be completely satisfied.
To add, I agree and understand your viewpoint @
FlareHabanero
. It would certainly make sense to have that mentality, and based on what you're looking for in Smash, I can't say I blame you. However, I still maintain that you should wait and see what Sakurai might have in store for him should he be playable. I think there are some things that Chrom could do without having to lose the Falchion or what have you.