To me, the layout of Cyrodiil is much the same as Morrowind only nicer, because thus far, I haven't discovered any Blight-like areas.
Also, I'm a big one for not following paths, so I've found tons and tons of little forts and ruins that are nicely marked for later exploration.
And, btw, I think the dungeons are much bigger in general than in Morrowind.
Also, I just picked up a rather spiffy set of light armor in a tomb... too bad it's insanely heavy for light armor
About that... I found pretty much every piece but the gauntlets (I know they're in there!!!). If any of you have been in that tomb (rough location in spoiler tags below), and know the exact location of the gaunts, please PM me or use spoiler tags to let me know where they are... I like complete sets
SPOILER: spiffy light armor set, on tomb location, said:
Thanks