That would be a horrible idea. Getting knocked down should always put the person who was knocked down at a disadvantage.
But the way it is now isn't any good either. The attacker shouldn't get to just mindlessly mash out strings on downed opponents with no risk of retaliation. That should never be happening. Should just be down attacks or kick em once or something, not the "just continue the string that knocked em down, it'll keep hitting them regardless and even force the character to get back up into the ongoing combo.". That's just idiotic, they need something different. The offense shouldn't be that mindless. Supposed to be about mindgames. Either get rid of force tech, or bring back ground counters, or something. Needs to be more balanced, not just "downed opponent just has to eat it". They were already downed, putting them at disadvantage, no reason to screw them over even more by removing all their options. Can't bait idiots into trying rushdown anymore and punishing, because in DOA5, mindless rushdown actually works a lot of time due to stun, force tech, and not being able to counter in so many situations now.
Fps syndrome, things are getting kinda mindlessly easy to cater to those who aren't good at thinking things through.
Anyways I'm just against any situations where one side has too much advantage, so I don't like ground game in 5. It's just the polar opposite of the high counter damage in 4, now its the offense that has too much advantage, they need to balance it better. Offense and defense should be even, with advantage to the better player, not just because one player can't do anything.
As is, we get total bs nonsense like Rachel and Helena because its so easy to exploit downed opponents for an easy win. That shit has got to go.
I'm just speaking from online experience.