He can use the time to make covert manipulations. He can try to divide the parties, he can even use the army again.
At a time people want to end rule by kings, if he is still allowed to act unconstitutionally and take such bold steps, how can we hope to have a non-interfering, powerless king?
I told him since the petition was already in court, he should ask it to be heard. Or he could activate lawyers to file a fresh petition. If parliament had been reinstated, the king couldn't have sacked him and begun direct rule.
The constitution doesn't give the king such sweeping powers. By reviving the house on his own he signals he still has absolute power to make and unmake such stupendous decisions on his own.