The first time Ichigo got hus powers was because of Rukia and when he lost them because of Byakua we found out that he only lost the powers Rukia gve him and not his own so he was able to regain it, now his own shinigami powers.
The after he used mugetsu(final getsuga tensho) he lost his powers again but a small part of it accumulated inside him and his fullbring was able to activate it but Ginjo took it. Ichigo seems to have lost his powers again but Rukia tells that what Ginjo took was only a small part of his powers mixed with the fullbring and not all of his shinigami powers and gives him the spiritual power of all the captains and vice captains.
Have I got all the details correct? so in the end is it just like the beginning now, In the beginning he had Rukia's spiritual powers and now does he have the captain's spiritual power? If his hakusui and saketsu were destroyed like his first fight with byakuya would he still be able to regain his powers bucause just like the first time he received the powers this time too?
Sorry that this is too long, I just want a clear understanding