Customary rule for Skyrim - long body armour... with overhanging leather or cloth of some kind for the weather
and also to fit aesthetically with the Nordic dresscode...
short version - Skyrim doesn't like outsiders... and it seems outsiders don't like skyrim? ... meh, just stay in 1st person

sorry mate
the shin boots look good enough as greaves for me.... and if you look at alot of ROMAN armour styles... NONE have pants... as you describe
but if your worried about getting a cold breeze up your new imperial kilt... then id suggest wearing ragged trousers... you'll find them on various prisoners all around skyrim... but then you wouldnt have very good armour... but at least you'd have pants
