Extremely helpful discussion that proposes tons of good ideas! Thanks to everycontributor. Here my 5 cents after reading all this...
Navrey: Easy fight, nice stuff, drop rate is okay (even though I was a bit unlucky the first 300 Navs
). You need some luck and you definitely will get your Tangle. IHMO: No change necessary!
Slasher: A bit harder fight but manageable. Can be boring on the long run - takes too long to bring him down. Nevertheless a good boss with some absolutely useless items and some really nice items. Droprate could be lower for the useless ones and higher for the goodies
. IMHO: Could be changed a bit.
Medusa: Easy and funny fight, nicely designed boss encounter, tons of common drops of which at least the bow is useful for some templates. Great major drops, which are a bit rare. But I have seen people getting the floor (nice!) and the statue (completely useless to me, would give it away - crap item). Never seen a slither dropping. IMHO: No change necessary!
Stygian Dragon: Insane fight, funny place, nice design. Many minor items of wich some are quite useful. The spellbook is nice! IMHO: No change necessary!
Primeval Lich: Great place, nice design, good drops. IMHO: No change necessary!
Mini-Champs in the Abyss: Depends on the champs. Overall a very nicely designed place down there with many challenging encounters. Got most of the arties I wanted within a reasonable time - except the Tinkerer-Leggins, took about a year... However, soloable, which is nice. IMHO: No change necessary except for the Ancient Lich Renowned wich simply takes to long (due to the Skeletal Lichs).
Osiredon: OH MY GOD! Booooooring. Takes FAR too long and drops are FAR too rare. Substract a couple thousand hitpoints and let him drop the goodies 10 % more often... IMHO: Changes urgently necessary!
Corgul: Nice place, nice boss, comparatively easy fight. Common items for almost everybody (sash/spellbook) which makes people feel good when leaving the island
. Rare drops a bit too rare - but: IMHO: No change necessary!
Charybis: Boring, not rewarding, forget about it... IMHO: Changes urgently necessary!
Melisande: I hate farming keys, the boss however is easy. Like the place very much. Drop rate is insanely crappy: Never seen anybody getting a crimson, only hairdyes (not the good ones, black for example is totally useless...), squirrels and minor arties (fey leggins). If it wouldnt be that easy to do, it wouldnt be worth to go there. IMHO: Changes urgently necessary!
Dradhorn: See Melisande!
Travesty: Keys fairly easy, boss encounter funny and location wonderful. A really nice place to fight - love it! Would really benefit from some better/faster drops (Drops: See Melisande & Dreadhorn).
Doom: Incredibily ugly place, incredibly boring fight, many absolutely useless items. But I know they will change it. It has been announced by the devs. IMHO: Changes urgently necessary!
Tokuno/Felucca/Ilshenar-Champs: Much to say about them, will be a long discussion. I think its a good idea to re-vamp them a bit - especially when it comes to loot and replica-distrubution. Many nice items which are very useful - I dont mind scrolls, but the arties could be distributed more equally amongst the participants of the fight. IMHO: Changes necessary!
Have to leave now, might complete it later...