You're misinterpreting it, a little. See, the reason I made the AP get worse when you put spikes on something, or serrations, is because the actual damaging part is spread out over a wider area, meaning that armor would have more opportunities to get in the way.
I can see where you got that and how it would work balance wise, but I'm not sure that it would work that way. Serrations allow for a sawing motion to be added in to a cut, which to me would give it the chance to tear through flesh and armor better. as far as the damaging surface of a blade being spread out, that's basically true for any cutting weapon. the length of the blade no matter how sharp, will be spreading the actual force across it's whole length that is making contact with the target, the only way to avoid that, is to stab and thrust, or use a smaller sharpened area to attack with. You might say this doesn't make sense after watching a katana sheer through something, but that has more to do with the style of it's use than it's sharpness. (if necessary I'll try and explain that in a PM.) Where serrations actually start to become a hindrance is when you start talking about where they land. I can tell you from personal experience that trying to remove a serrated blade that is stuck on thick bone is a serious pain for both parties. Another thing I dislike about them is that they are impossible to sharpen with out special tools in most cases.
So, any ideas on other possible mods? Maybe some things calling on SR tech that I haven't thought of?
Off the top of my head nothing terribly impressive (imo anyway).
I've had a few Ideas that seemed like they might be good, but I'm not sure about.
for instance, a smartlink type program for melee weapons. It would in theory use a runner's data feeds from sensors, (eyes etc.) to work out weaknesses in an enemies fighting style or armor, allowing for a making a called shot -1 rather than -2 DP and giving them a +1-2 DP while using said weapon in melee combat. it would project via it's program a HUD for your cybereyes, contacts, or wherever you store your vision modifications.
ways of coating a melee weapon: with either toxins or with existing nano tech to deliver focused doses of nano machines, RFID tags or toxins inside a target. the nano machines and toxins explain themselves, but the RFID tags would be helpful if you needed to track the person if they got away. somehow. Just have the tags screaming at every node the pass by relaying to you where they go (I know you could shoot them with a RFID tag from a gun, this is another option.)
Seem to be missing Ceramic/Plasteel Components as useful melee weapon mods; you know, in case you want to use something else than a ceramic knife.
I do like this one though.^
most of my Ideas focus around weapon design more than modification. ex: The better it's built, the less mods are required to mitigate it's function.