You want a better solution? Come up with a GAME OVER screen. Sure it's not really any different but if you kill Prince Important Quest Giver, rather than popping up the load game box, have the screen go blank and a big slide come up (ala Fallout). It can be a nice image of the dead Prince and a voice-over saying "With the death of the Prince and no-one left to command the army, the Elves were over-run by the Orcish hoardes."
Exactly. If the character is a realistic absolute turning point for the outcome of the main story, having a small ending works great. The story of Fallout 1+2 is what happens to Vault 13/ your tribe, if you kill them you get an ending.
Only a few people would realistically be that important.
But Oblivion will probably use the same system of Morrowind of having the pointless main quest givers be essential for no reason.
This guy beat Morrowind in 14 minutes without talking to any of the "broken world LOL people", so why the hell do they matter?
Race: Argonian (Chosen for 50 Speed, 40 Intelligence, Alchemy Bonus)
Class: Assassin (Chosen for Speed +10, Intelligence +10, Alchemy Minor Skill)
Sign: The Steed (Chosen for Speed +25)
Scyda Neen
Take ring (all) from barrel outside
Talk to Sellus Gravius "Morrowind", "duties" (gives you gold)
Travel by siltstrider to Balmora
Balmora
Go to Mage's Guild
Speak to Ranis Athrys, "join the Mages Guild"
Mage teleport to Caldera
Caldera
Steal master's alchemy set from top of tower in Mages Guild
Go to Ghorak Manor, steal Orcish armour from crate on top floor
Sell Orcish Greaves & Cuirass to Creeper
Go to Verick Gemain, Trader, Purchase Warhammer of Wounds, Amulet of Recall, and sell unwanted items
Mage teleport to Sadrith Mora
Sadrith Mora
Mages Guild, Purchase 10 Corkbulb, 10 Racer Plumes, 10 Trama Root from Tusamircil
Go to Imperial Shrine
Purchase 5 Chokeweed, 10 Saltrice from Scelian Plebo
Purchase 130 Ash Yam, 65 Bloat, 5 Guar Hide, Divine Intervention Spell from Aunius Autrus
Assign quick keys: Warhammer (1), Alchemy (2), Recall (3), Divine Intervention (4)
Create and drink Fortify Intelligence in batches of 5
Create Levitate potion
Levitate to Apothecary, Purchase 7 Shalk Resin, 5 Kagouti Hide from Pierlette Rostorard
Purchase 2 Vampire Dust, 60 Bloat from Anis Seloth, Alchemist
Create and drink Fortify Intelligence in batches of 5 from Ash Yam & Bloat
Create 2 Fortify Strength & Fortify Health from Ash Yam, Vampire Dust, Shalk Resin
Create 5 Fortify Luck from Guar Hide, Corkbulb
Create 5 Restore Health from Corkbulb, Saltrice
Create 5 Fortify Speed & Restore Fatigue from Kagouti Hide, Shalk Resin, Saltrice, Chokeweed
Divine Intervention, go to Mages Guild
Mage teleport to Ald-ruhn
Ald-ruhn
Purchase 3 Mark Scrolls from Tanar Llervi
Assign quick keys: Scroll of Mark (2)
Levitate North-East to Vemynal, Mark outside, get Sunder, Recall
Levitate South-East to Dagoth Ur, Mark outside
Levitate South to Odrosal, get key from Dagoth Odros, get Keening, Recall
Dagoth Ur
Run through facility, Mark Facility Cavern
Kill Dagoth Ur, enter Akulakhan's Cavern
Strike Heart with Sunder
Destroy Heart with Keening, equip other weapon to avoid death
Recall to Facility Cavern, speak to Azura