Is Mueller rushing to get out parts of the investigation?

Normally in a special counsel investigation, the investigator would Finnish with all aspects of the matter, connecting all of the dots, before disseminating the final report. In this instance there is a situation where some of the information gathered could have grave implications for national security. It could be the case that the President of the United States has conspired with an unfriendly country to affect the outcome of the 2016 election, and that he continues to be compromised by that country. It is also evident that there is a furious ongoing attempt to discredit the FBI, Robert Mueller and thus the investigation by a consortium of right wing news sources and Republican politicians. It raises the possibility that Mueller could issue a partial report, centering on conspiracy and obstruction of justice, while still working on the financial crimes such as money laundering and tax evasion.

It has come to be revealed today that Mueller has interviewed Jeff Sessions, and that he inquiring to question the president, which might indicate that he is coming to and end of at least part of the investigation.