All I have to say is that this wasn't a bug-report, I know that this is all within the realm of melee mechanics and this that it's not a bug. I'm bringing these to light because they already are the meta for some veterans, and will become the meta to everyone if they're left as they are.
In general, I disagree with powerful combos because they cut a fight short and have the possibility of making all of melee less varied, because that's the favoured technique. If you're okay with less-varied melee(Which you aren't) and you're okay with fights being cut down to a single combo(Which I'd like to hear your opinion about), then melee won't be about who can consistently outsmart/bait/juke/predict their opponent. It will rather be about who can land the meta-combos first. And no, there won't even come a fight from who can land it first. It either happens or it doesn't nowadays.
This may not seem like a powerful combo by itself, but used in conjunction with everything else it can start dealing massive damage. This double hit is more like a general addition to any combo.
The first combo where I simply punched twice is useless unless that's all it takes to kill your opponent or there's not enough space to kick into grabs.
Here's how it goes: You perform the most powerful combo you can, and that's most likely all you need to do. You could most likely atleast even finish off your opponent thereafter quite easily, or leave them to die. Yes, there is rarely a fight at all due to this, and there shouldn't be. Having an exchange is now the worst thing you can do in melee because there are way faster ways to deal damage.
Here's a short damage table depending on what you can do (I'll be using info from the SFD fan wiki or
https://docs.google.com/spreadsheets/d/ ... edit#gid=0 for damage values):
If you can only punch twice and don't have any weapons, it's atleast 17 damage right there. It only gets higher with better weapons, and can be performed almost anywhere due to the design of the official maps.
A better combo is to grab, so you would need to punch+kick and then grab. With just fists, that's 28.5 damage. It only gets higher with better weapons.
If you can throw, then you will deal atleast 42 damage. This is just with the pipe wrench, using the punch+kick+grab+throw combo available almost all around the map.
With a knife, 67 damage.
Katana: 65.
Chair, and throwing the chair leg: 47.
Suitcase(Which deals most damage thrown) would require you not punching but only kicking, so you'd deal 37-39 damage.
Trashcan lid: 47. Also, the punch+kick+punch combo would deal 18+3+18 = 39 damage.
There's also a way to perform the throw+punch+kick+grab combo so that your opponent will be left vulnerable to the rest, even if he blocks the throw. This is if you start the combo with throwing, and you have the possibility of immediately starting the rest of the combo after throwing. This works due to how badly and sluggishly blocks catches throws.
If you want such combos that deal more than, or just shy of half of your HP; that can be performed almost anywhere(And completely avoiding this risk means restricting yourself alot); and that are the meta and therefore make melee less varied; then I have nothing more to say.