Since you have the definitive MM8-10 weapons for now (or between you and Korby for Trip Blade), I'll post some thoughts here instead of necroposting a four-month old thread.
Thunder Claw: LOVE IT! Great for mobility.
Tornado Hold: LOVE IT! Emulates the source perfectly!
Flash Bomb: It seems like something that will wreck someone's day, but the damage is a little weak. Then again, a damage buff might make the weapon too powerful. Perhaps this is how it's meant to be, as the source game is like this as well.
Ice Wave: Just right. Hard to hit a strafing target with, but someone off-guard will get it...as well as anything on the wall above or below it.
Flame Sword: Seems to be more powerful than Slash Claw. Maybe the weapon consumption should reflect this (then again, it may already--I'll have to take another look).
Homing Sniper: Currently, it's a Dive Missile replacement. Maybe holding the mouse should throw a crosshair up and letting go of the mouse releases? If the locked-on enemy is no longer on the screen, then the crosshair can lock onto something else. Food for thought...
Astro Crush: Needs a damage buff. Perhaps this should be the BFG or Redeemer of MM8BDM: One shot, one kill, weapon breaks. Let it spawn from the roof. That way people have a fair enough shot at running away from the dang meteors, but yet should know better than to be in a cramped room with an Astro Crush opponent...
Water Balloon: As is now, perfect!
Concrete Shot: Love it! A weapon that you need to be precise with or else you'll pay dearly, but if you hit, switch to something else and finish 'em! Also good for extra stepping blocks!
Jewel Satellite: Perhaps have it reflect what Leaf Shield doesn't reflect (i.e.: "cutter" weapons)? Maybe have it reflect a few other items, too. This is one weapon that SHOULDN'T be 100% true to the source, as it'll make every other shield redundant.
Hornet Chaser: I heard that it was not possible for the projectile to bring a weapon to the player, but is it possible for the projectile to actually home in on a weapon/item ile, and then, upon contact, grant the player the appropriate weapon/item? That, if possible through Skulltag, would make Hornet Chaser leaps and bounds more useful than it is now.
Tornado Blow: LOVE IT! Emulates the source as well.
Plug Ball: Not sure what to do to make this different from, say, Search Snakes. I got nothing here...
Black Hole Bomb: It is difficult to use...is there a way to increase its effective blast radius somewhat?
Magma Bazooka: Faster charge rate, but more difficult to instagib makes it different enough from Atomic Fire.
Laser Trident: Needs a firing rate increase. If that makes it too powerful, nerf the overall damage and/or increase weapon consumption. On the other hand, the current firing rate does make it different enough from, say, Yamato Spear...
Triple Blade: Not getting into this philosophical debate...
Solar Blaze: Good good good.
Thunder Wool: How to balance a weapon that sucked in its original source? What you have is a good start (in fact, almost the opposite: your cloud does more damage while the source's bolt was where it's at). I say keep the damage on the cloud the way you have it, but either:
a) Not have the cloud move when the lightning comes out...but give the bolt a ripping damage property
or
b) Keep the cloud movement, but give the bolt a damage buff
Chill Spike: Nice and practical, and as Ivory said, different enough from Spark Shock to be useful.
Commando Bomb: Nice and powerful (knowing that the source material's guiding mechanics may be difficult to emulate...like Gyro Attack, for example). This is a winner as well.
Wheel Cutter: A slight damage buff on the saw could help. Otherwise, great mobility weapon when used right!
Rebound Striker: True to the source, great weapon, not too powerful. If people get trapped in a corridor with a Rebound Striker user, that's their own fault.
Water Shield: Perfect. Yes, the firing arc makes it difficult to hit enemies with, but that invincibility for so many "bubbles" more than makes up for it.