Hi everyone, especially map creators. And big thanks to Zwiebelhen for ressurecting this project. You created astounding and wonderfull map, maybe one of the top 10 in W3 and probably the best for me. And by that genius act you also created a lot of precious memories for fans. It's pity that Gaia was not finished. But now you gave us all new hopes.
Personally I have been playing Gaia since autumn 2009 with few breakes. But generally I'm great fan of Gaias Retaliation so I thought that I should said something in discussion and ensured you of our ... support. And to share my thoughts with you.
First of all i have to endorse most of things that SmileyGhost said. There are some differenties in our detailed opinions but cardinal thesis are the same.
So my ideas are as follow:
1.There are few unused traders at Mytargas Trade District. You should do something with them because they look somewhat ... ekhem... mysterious?
2.I have to confirm what Kris said about Fatal Error, that is induced by 2 synchronised actions of skeleton mages, probably casting two thunderbolts at the same time. Error usually, if not always, appears in D3 when engaging in battle with 2 groups of undeads below Firelord location. Error is not caused by fight with single group of undeads in that location.
3.I would advice adding few monsters, let's say sludges of 2-3 types, in the Mytargas sewers just like Soulkeeper said. Sewers in RPG always are filled with monsters

. Also the location after the bridge at north from road to Mytargas might be inhabited by some creatures or NPC (maybe Hermit with guest, e.g. who has a solve to Mytargas fungi problem). Near to that bridge is dead forest that also may be a good location for some improvements (just few creatures, maybe undeads/shadows, are sufficient).
4.Ring of Shadows has been often droping from robbing Sanev in earlier versions. I have been playing in version 1.1e many hours and haven't found it, haven't even seen it. Maybe it's some problem with map settings. Or just bad luck.
5.The main problem of version 1.1e in my opinion is rangers pet. In my humble opinion rangers pet at lvl 40 is unacceptable. At least his outlook

. For those that haven't seen it yet, it's boar, the same like that 11 lvl boars from hunting quest. It has to be some kind of mistake or maybe joke. But it's just imho. If i were you, i would switch him for larger wolf or ... grizzly, tiger, whatever, but not boar.
6.Spelltrap? Consider other names like Counterspell, Reflection or Spell Shield.
7.Necromancer Sacrifice spell might cause an explosion hurting all targets in small radius, even allies, in addition to mana recharge because necromancers minion shouldn't be only walking mana potion that can take few hits. It may be a bit unlogic but skeletons need a boost, that is a fact. And sacrifice spell which gives only mana looks weak. And it is weak. Just like necromancer at all now. Necromancer doesn't need a mana, he needs power.
8.Assasin need's a new trap imho. For me it should be time bomb with, e.g. 5s casting in stealth mode and 3s counting for squad regrouping because of massive explosion threat. You should also consider "coup de grace", skill that could do a huge damage on sleeping/stunned/etc. target.
9.For Bishop I would advice an exorcism. It means spell that works on one target and do a small amount of divine damage/healing and efect of stun+slow/cure and repel of all curses, poisons or other negative effects depending on target type.
10.About Berserker now... You may give him battle shout, aura, some kind of enchant like berserker's fury that works similar to illidan's immolation. Maybe some passives - add to weapon or to hp&armor. Also Shockwave or War Stamp are interesting. Your conception, your choose. For me similarities of Berserker and Crusader in tanking aspects are fine but it's true that in new version they should differentiate in applications.
11.PvP is not crucial in Gaia but idea of utilizing Arena in PvP for gold may be good. I would think about experience or other bounty for winner. Now there's no use for huge amounts of gold at high lvls. You can only accumulate thousands.
12.Because you have small amount of time, staff and resources my advice is that in most changes that consist upgrades of features contained in 1.1e you should base on things that you have created so far. E.g. adding new monsters in existing locations like sewers or expand of terrain at east from Mythargas imho might be done only by using ready to use resources. Then you might focus on additions to 1.1e.
And that's all i think. For now

. So all that left to wish you good luck with ending that project. Gaia has a lot of fans, most of them had never entered this forum but they exist somewhere, trust me. Not as much as other maps because noobs doesn't understand Gaia and leave quicker than join. But those who remain transforms into Gaia Fanatic that is no cure for that. And all those maniacal fans count on you. Their... Our hopes too.
PS: D3 needs only a team of 3 professional players with reasonable equipment and average lvl 36 (min.32) that contain tank (crusader/berserker), healer (!!!BISHOP!!!) and proDPS (Mage/Berserker or maybe Hunter/Assasin). But Bosses are hard indeed. Firelord in addition of good micro needs also special gear set for all team members. But a key to all Gaia problems is good tactics combined with good micro.