LOL! I'll defend a lot of stuff from Oblivion, but there's no way I'm defending the speechcraft mini-game. :lmao:
More to the point, Daggerfall might well be the last Bethesda game with a defensible speechcraft implementation.
Fallout 3 was a blatant dice roll right in the open, for the most part, which is probably very Fallout-ish, but not very appealing, given it was a hard succeed/fail. Once you botch it, there's no incentive to improve your skill and try again.
Oblivion's minigame is overpowered and bribes always succeed (even if you never need them).
Morrowind was equally bad in the opposite direction: the failure rate for anyone is so high that "the golden path" dominates any character not specifically designed around the skill... yet Taunt will always eventually succeed, providing for 100% legal murder. Might as well show the dice on-screen, much like Fallout 3.