Assuming he breaks the Izanami, he'll be still have everything but Oro's chakra.
That means he'll still have access to:
DSM - This he learned on his own.
Hawk Techs - He assimilated them into his body.
Edo Tensei - He knows how to use the tech still.
Sound 5 Techs - He assimilated them into his body.
Oro's summons/techs - Possibly lost because Oro took his Chakra from Kabuto. Its not the same as the cursed seals though because those were Oro's sage chakra sealed into the person. Kabuto implanted DNA into himself. That means there's still a possibility that he can regenerate Oro's abilities. However its more likely that when Oro took his chakra back he removed that capacity from Kabuto, DNA aside he probably took back his life force rendering any Oro DNA kabuto has unusable. That is up for debate though, but its what i think. The only reason this comes into question is because he needed Anko to harness Oro's chakra to boost himself even more. Does that mean she was a well, or a bucket? did the chakra replenish itself in her, or was it one time use?
What we should focus on is the extent Oro's chakra augmented Kabutos. He still has knowledge/access to all of the techs above except probably oro's, we know that he lost the power but can he regain it later?
The sage mode requires chakra control and chakra capacity to use; considering what Kabuto did to himself through experimentation and survived i think he still has the ability to control DSM.
The kekkei genkais I think he can also still control. They were DNA augmentations. Again his body was able to handle them.
Edo tensei he still knows but since the release he'll have to redo the rituals to get back anyone who was summoned/released by Itachi. However, the amount of summons he can control will be diminished because he lost Oro's chakra.
Assuming he's cut off from Oro's power indefinitely we have the following questions. How much did Oro's chakra augment his abilities? Can he still use the kekkei genkai together? Can he control the kekkei genkais as easily now? Was his chakra strong enough to handle sage mode before? How many edo's can he use at once?
All things considered, he should still be able to use the abilities from above, but in a diminished state. If that's the case he's still pretty strong compared to the top tens flying around.