This page has a list of things I found to be broken (if it helps):
http://www.phantasystaronline.net/forum/index.php/topic/23565-kthanksbye-what-could-have-been/page-1
There are also suggestions in there of things that really should happen. But since people are lazy, I'll summarize.
Broken:
Asteron Striker (Supposed to be usable by hunewearl, but isn't)
Glide Divine V.00 (Currently broken - doesn't boost 3rd technique. If reverser isn't possible, suggestions of Anti or Shifta would suffice.)
Godric's Cloak (Currently broken - doesn't boost ata and is usable by wrong classes)
Slicer of Vengeance (Currently broken - skin is wrong and looks horrible)
Stealth Sword - Desperately needs more ata
Sword of Ultima - Desperately needs more ata and atp
Broken and not listed on that page:
Solferino - No range boost to techs
Genpei - Um for one, doesn't drop anywhere even during events. For another, I understand several of the different skins are broken.
Samurai Armor - The tech boosts were not able to work (according to Lee), so we added luck and other stats to it. They were later removed by accident and never restored.
Suggestions:
Rika's Claw - Boosts gi techs, but is not equippable by forces. GI boosts aren't as useful for non-forces. Modify this weapon to allow it to be used by all forces. This would be a much cooler weapon for boosting techs on fonewm and fomar since magical piece is so girly.
Clio - This is a good weapon for boosting zalure range and can be used by ramarl, but not hunewearl. Modify this weapon to allow it to be used by hunewearl. This would make hunewearl more desirable to use.
Nei's Claw (Real) - This weapon boosts simple techs and is insanely rare. However, it's not usable by the one class with native simple tech boosts. Modify this weapon to allow it to be equipped by fonewearl. Perhaps people will want to start donating for this weapon if it can be used on fonewearl.
Siren Glass Hammer - Natively boosts gibarta and has grants special. Neither are very good. Increase gibarta boost to 100%. Add grants boost of 25% to help the usefulness of the special.
Sword of Ultima - Raise stats to be at least as good as Zanba. A weapon with the server's name in it should be an amazing weapon. ATA is waaaaay too low and so is ATP.
Virus Shield - Great shield for newer players, but its ata is lower than red ring and its tech boosting abilities are for unpopular techniques. DEF/EVP and resistances are also lower than most other shields. As a result, very few people use this shield and its value is quite low. Modify the boosts from 20% gi boosts to 45% gi boosts. Change EDK, EFR, ELT resistances from 10% to 25%. These changes should make this a more popular shield.
Power Maser - Very weak weapon and combo locked. Unlock this weapon.
Psycho Raven - Amazing gun, but still not usable by all males. Allow it to be equipped by fomar and fonewm.
Sambas Maracas - There are no guns for male hunters and forces with long ranges. Modify Sambas Maracas to increase the range to handgun or laser range. This will allow male hunters and forces to have a longer-range weapon for dealing damage. The special is basically useless and the atp is incredibly low, so this shouldn't imbalance the game, especially since the weapon cannot grind.
Gael Giel - The most valued mag in the game. However, it does nothing at bosses. Consider adding invincibility or shifta/deband at bosses.
Blood Sword - Great weapon. Limited classes can use it. Change requirements so fomar can equip. All other forces can use it. I'm not sure why fomar was excluded.
Dancing Hitogata - Considering how rare this weapon is, it should be amazing, right? Nope. Barely does damage. (I've tested with 100 100 0 0 100 stats and it still barely does anything on a fomar with max atp, ata and luck.) Consider giving this weapon a significant boost, like adding 300+ atp and 30+ ata to it.
Guld Milla - Once an invaluable weapon for rangers. Now that we have added gush yasminkov, this collector's item isn't very good. The range is shorter than yasminkov, but the yasminkov works just as well if not better for gush. Allow it to be equippable on ALL androids (hucast, hucaseal) and it would become a very popular item.
Daylight Scar - Add Fomar to list of classes that can use this weapon. Vivienne and other weapons are easy to obtain by Fomarl. Fomar has no such luck. Adding daylight scar would allow Fomar to get weapons that are obtainable year round (unlike Girasole which is a damn hard drop)
Ignition Cloak - Severely boost fire techniques. With how rare it is, it should be better.
If I think of more later, I'll edit this post.