Yes, spears were exploitive in Morrowind's combat system. Actually Morrowind's combat system as a whole had a lot of faults too.
Maybe they should change it...
Oh wait, they already did.
What I'm saying is that your reasoning would only make sense if both Oblivion and Skyrim would use Morrowind's combat.
No, it wouldn't only make sense if they used Morrowinds combat, people stated their discontent and beth did not include them simple as that and I said nothing about Morrowind Combat being flawless, but Morrowinds Combat being superceeded by Oblivion is not an Argument, that comes with time. they didnt add spears because thats what they drew from their fans, whether or not that was the correct action is a subjective personalization.
However let it be noticed that these complaints were true of morrowind, it was bethesda that chose to "fix" them so poorly.
However the mere fact that magic in skyrim is no longer limited to balls of bad particle effects means that bethesda is capable of doing it right. So in other words I have faith in them, but that much
Thats the point...people complained, and it shapped the next game
Completely subjective and its just another example, I don't consider Fable 3 type magic, "good" or doing it "right"