TBH I'd rather they just up shield damage on stuff like canonball... *shrug* TBH that damn thing should shatter shields if it's fully charged. Right now to 'reliably' shield break we have to lock them up with a MK then side-b and hit all 3 hits of up-b including hammer while they're still stuck because of MK placing. I mean, I guess there's other methods, but that's the only one I've hit out on several occasions with D-smashes after pressure being a close second.
I think a command grab would be excessive, TBH. You'd just literally not use normal grabs, and it'd have to be an insane command grab to be worth using over just, say, good spacing with stuff like f-air (-and really, you want a command grab that's possible to use when your opponent is most likely to shield? Excessive, much?). Characters that have command grabs generally already have decent enough normal grab options too. Koops just ain't grapplers, that's just the unfortunate side effect of playing them, which is exactly why their shield pressure should be better - no sane player shields half of the good shield damaging stuff we have with exception of D-smash, and that's a shield finisher at best. Sure we have some lingering hitboxes that can pressure really nastily in the right circumstance, but it's still not enough for reliable shield pressure.
Then again, you could argue that since no sane person shields, say, mechakoopas, they have to roll, or jump, and those options can be capitalised on too, I suppose(?). It's just a very weird topic because although our shield pressure is just awful I've never suffered really because of it.
I've said it before, but Koops is like... Set-up after set-up after set-up. It's difficult, but you have to just get an opening and seize it.
That being said, Jr. did shield break Mario in his reveal with what was obviously a f-smash, so, you feel that would be more prominent in their play... What's with that, Sakurai? Huh? You gonna-- uhh?.. -live up to that idea? Huh?.. Ryu basically insta-breaks shields with a dumb move, and Marth can't even do that properly anymore, why can't we?