The surge in Arab turnout and the likely strong result for the Arab parties Ra'am and the Joint List is the main story of the election (with the subplot of Haredi de-motivation and dysfunction). Both they and the mainstream Zionist opposition face some tough questions about what they can or should attempt in government formation.
For the Arab parties, this is an incredible result far exceeding 2015 and 2020, and with two parties rather than a single Joint List. The first question will be how to convert the result into actual benefits for Arab Israelis, which failed in both 2015 and 2020. Ra'am will want to do that from inside a coalition, and the Joint List from outside.
The second question will be whether this feat can be repeated in a future election. If not, then this political capital must be spent immediately and fully to avoid wasting it. That would mean forming a government with the opposition (Ra'am), protecting it (Joint List), and then making progress from the inside or demands from the outside that justify the higher level of engagement with Zionist parties. That would keep voters motivated and engaged in the future, since they would see results.
The mainstream Zionist opposition faces a different dilemma. There is likely no one to pull into coalition with them from the other Jewish parties without sacrificing a key aim: compromising with the Haredim undermines a core priority for opposition voters; pulling in Smotrich or Ben Gvir will erase any potential to improve relations with the outside world and upset the base; and pulling in Netanyahu risks a rerun of 2020, limiting the benefits internationally of a new government, and is not what opposition voters have signaled they want. That leaves the Arab parties, and more specifically Ra'am.
Many of the things the Arab sector needs in Israel--crushing organized crime, investment in infrastructure, education, and communities, etc.--are no-regrets policies important from a basic governance perspective. Greater integration of the Arab community into Israeli society is also key for political and democratic legitimacy, both internally and externally. In other words, much of what the Arab parties want that is not political are things that Zionist parties can and should do anyway.
A minority government is not likely to last long. But the combination of circumstances producing today's results--Haredi dysfunction, poor arrangement in the coalition bloc and burned votes, and sky-high Arab turnout--is not likely to repeat itself. If there is an option for an opposition-Ra'am government now, the only viable path forward with it could not be timid. It would need to act and demonstrate results quickly so as to have something to run on if the new government collapses.
A unity government promises a certain sort of political safety which should not be underrated, and it would have the legitimacy to make hard choices on a range of issues (if it was able to). But it will not look pretty either, and would be hard to manage in its own way. That's not to mention how it would surely be viewed in the U.S. and elsewhere, let alone the opposition's base, for failing to dislodge Netanyahu.
These considerations are not simple or given to quick answers. Party leaders will have plenty of time to think things through in the coming week. I wouldn't expect a clear answer any time soon.