Hmm... Daggerfall's lore hasn't been entirely retconned yet, has it?
Hm. Well, as said, I was going by what we see in the games, where the Empire is reasonably internally strong. One could hadrly have had all that impeiral ifnrastructure in comparably seditive Morowind if it was otherwise!
Per the Brief History:
Under Uriel IV, Emperor and Elder Council were in constant dispute, weakning the Emperor's power.
Under Cephorus II the Camoran Usurper ravaged western Tamriel, and he was stopped by regional, not imperial forces. From thereon, fragmentation starts.
Uriel V managed it to band together the various forces for his grand project, the conquest of Akavir, but di dnot inf act repair imperial administrtaion, and his detah in Akavir probably only helped fragmentation further.
Uriel VI's reign started with an overlong Elder Council regency, further weakening central power. He eventually managed to wrestle power from the EC, and began to reform the Empire - but only his successor, his sister Morihatha created a working government for
Cyrodiil, while there still wasnt for the outer provinces (!!!).
Morihatha tried to correct that, but was being deliberatly slow, so she only started to repeair the damage.
And her precedessor, her nephew Pelagus, Uriel VIIs father, is described as being ineffective.
So, by deduction, it must have been Uriel VII who continued and finished Morihathas work. As we do see an orderly Imperial presence in the outer provinces, after all. I dunno if thats a retcon (if, it was by Morrowind already). One could intepret that on that even Uriel had not been entirely successful and finished up with the repairs.