I laughed at the "highly detailed" part involving Daggerfall.
Heh, looks like he edited that out.
ignoring arena...
daggerfall- insane amount of skills,insanely large world, lots of lore and factions. multiple endings to the plot
morrowind- comparatively very small world but balanced out by incredibly detailed lore and landscape. highly detailed guild system. plot fleshed out fantastically. fantastic world. tod remains fairly uninfluenced
oblivion - few skills, low amount of armour slots, removal of cool stuff. low amount of lore, uninspired and repetitive landscape, basic guild system, generic and illogical plot. more emphasis on combat (although by itself the combat was still pretty poor). land is blatantly Tolkienified
skyrim- even fewer skils, removal of lots of stuff even from oblivion, combat is main focus, more conan and less tes, armour designs dont belong in tes.
estimated tes 6- even fewer skills, tiny randomly generated land, most likeley tod trying to imitate the latest fantasy movie with a little tes.
estimated tes 7- skills are combat,stealth and magic. another fantasy movie ripoff with a little tes involved.
(edit: everything they tell us about skyrim is that it is still simplified, the only instances that involve skyrim not being simplified is a dynamic overlay system for warpaint and stuff,the return of enchant and combat. thats it.
/extreme pessimism
Morrowind had fewer skills than Daggerfall, and Oblivion had even fewer skills, but Oblivion did not start the "few skills" trend as you seem to suggest.
Oblivion removed "cool stuff?" You must have been really looking for bad things to say about it...
Oblivion had a "low amount of lore?" Normally Seti would have gone insane on your for saying that, and would have listed a bajillion different examples of how much lore there is in Oblivion, but that fact that he didn't really, really shows how silly your argument is. He doesn't even find it worth his time.
Oblivion had a "generic and illogical plot?" You saved the world in Morrowind and you saved the world in Oblivion, and neither plots were "illogical." Morrowind's might have been more complex but that doesn't make Oblivion's generic.
I could go on... point is you're really trying too hard to find things to whine and moan about, and this forum has enough unwarranted pessimism as it is. If you don't have faith that Bethesda did what they did in Skyrim for a reason, then what are you still doing here?