After you've saved the continent from a war and saved the entire galaxy what do you get? A house in white run that doesn't even have a proper roof.
If you played through the Civil War and Main questlines and ended up with nothing but Breezehome... UR DOING IT RONG.

Either that or your Dragonborn needs a much better PR rep and/or business manager.
After you complete these storylines you should get much more. I was thinking maybe the option to raise your own city and become a jarl
A Jarl is only a Jarl because he/she rules a hold, and all nine holds of Skyrim are already spoken for. Particularly in a time of civil war, when the loyalty of the Jarls is of such importance, I don't see one side or the other "rewarding" one of their supporters by taking his/her land away to cobble together a hold for some upstart who 1) may not be a Nord and 2) even if he/she is a Nord, doesn't come from one the prominent noble bloodlines. Rulers in Skyrim are drawn from what is apparently a very small pool of eligible applicants and lineage matters.
or maybe command the imperial armies
Far more likely than becoming a Jarl, but still fairly boring IMO. The kinds of rewards you're asking for involve a lot of sitting on thrones and/or at desks delegating all the actual fun to other people. There's a reason the game keeps you in a position where you're always the one being told to go do something, and not the one telling others to go do it.
and be able to have options to attack certain eleven targets or something.
Which eleven targets did you have in mind?

What do you think and what would you want as a reward? In oblivion you got a nice set of armour.
I make my own armor at home. But, hey, if I can still find a free mannequin to hang it on, I'm not gonna turn it down.
