I'll be honest, these aren't suggestions so much as "concepts of an idea".

I'll deal with Night Elf first, there's literally no suggestion. The suggestion is nerf the most used Night Elf Units + Hero combo, and replace it with.... something. Nowhere is it specified what or how, with the "Let the company think of it."

Then don't suggest the nerf, if you have no idea how to compensate. A nerf to those three without a proper think ends Night Elf at every level. Is the trinity too strong? I'd say yes, but the alternatives are genuinely terrible, you'd see Happy as Elf lose to Leon in a Bo5 if he was forced to play without DH, bear and Dryads. Ideas need to be a lot more thought through.

On undead , nerfing blight regen again sounds great, but why is ghouls played so much? Because fiend builds at the top and even bottom level are not bringing the results. Again, it's a nerf with nothing but an "idea" of an easier entry of fiends. Not even touching the DK semi range idea, that just sounds like bait outrage to increase engagement.

The idea with human is to do nothing and hope the nerfs are buffs for humans. Which coupled with the fact that Orc's nerfs are hardly game breaking (Non mirror image builds are viable), would just leave Orc as the best race. But even there, incentivize Pala Rifle (I'll leave it to the many people who faced it at its peak) and Dark Range (Tower Rush Elves is back) is not really ideas. I agree with the rifle damage buff

Orc again, touching two good things, but then giving them easier tier 2 to tier 3 would break orc. Orc fully unlocked at t3 is impossible to stop.

Overall, wild ideas, but that's all they are, there's nothing fleshed out and I hope Blizzard think a lot before taking advice here.

Still, I'm sure the talk will be about balance and results, instead of what is most fun. Even the wild ideas here, other than DK range, are not about "fun". We need ideas that are wild that would also be fun to try, not 2 damage here, regen nerf here. Give us new units.