The Kejriwal's exit from governance had been a predicted one, as he was hinting at it every now and then. But, he did it almost perfectly it seems, even though there are some apprehensions from a minority of observers.
This exit may also answer, why Mr.Kejriwal took his time(48 days, to be exact) in bringing Jan Lokpal Bill(New Lokayuktha Bill for Delhi), on which he and his team were working over years even before the AAP(Aam Aadmi Party) was launched. Instead of trying to pass it as early as possible, Mr.Kejriwal concentrated more on some of the other core issues of their manifesto and ensured that at least some part of them got executed.
He knew that he didn't had enough time to fulfill all the promises in the manifesto, since his main aim, rightly, is whole nation, not just Delhi. And he doesn't want to wait till 2019, as it is difficult to sustain the fire in the hearts of the people against corruption till then. So, he gave a glimpse of uncompromising governance to reassure the Delhi-ites(Which seems to have worked acc. to some surveys after AAP's exit), before taking up the Jan Lokpal Bill in the Assembly, which was the main reason for his existence itself in the politics. He did say that they were working on the bill from time to time, though.
He also knew that a strong Jan Lokpal Bill providing independent investigating powers to an autonomous body may not get the approval of both the major national parties in the Assembly. But to ensure that they do reject it in someway, a day before the assembly, he showed that he is going to pursue the corruption cases by launching a FIR(First Information Report) against the biggest name and highest authorities in the country. He acted upon the complaints made to him by TSR Subramaniam, a former Cabinet Secretary and co., by using the CrPC's principal of territorial Jurisdiction, which seems to allow ACB, along with the CBI to exercise concurrent jurisdiction over corruption crimes committed by Central public servants in Delhi. And The technicality that both Congress and BJP argued missing(which wasn't a problem for them in earlier assembly bills) couldn't really be the reason for their rejection to the bill. And thus Kejriwal not only achieved his safe exit but also succeeded in demonstrating that both Congress and BJP do come together when it comes to,a strong law against corruption or big corporates.
It is a safe exit for Mr.Kejriwal and AAP on two counts. One, because he can't tour the country, campaigning for Loksabha elections, without getting slammed for leaving the governance of Delhi after mere two months, unlike Mr.Modi, who has the luxury of having governed Gujarat for 2+ terms. There could have been a divided opinion inside and outside, on whether he should stay in Delhi and govern or should he go for campaign. Two, now,they can go to the masses without the unconditional support of congress to their government in Delhi, which was considered as a compromise between AAP and Congress by a sizable citizens of India. Also, not being power hungry tag can be used when there is a need.
There is no doubt that all AAP trying to do is expose that Congress, BJP and other parties are not serious when it comes to eradicating corruption. And they are in a hurry to change it quickly, as agreed by their leaders on various occasions. As several analysts, intellectuals always say, it takes time to bring out a sustainable change. But, it doesn't mean that you shouldn't try to do it as fast as you could. AAP is a young party, and synonymous with the current youth, they want to do it quick. They should target for a sustainable change, but not a change that can be changed back.