When talking about the monarchs ascending, I think there always has to be a reminder of the different scales of the collective whole. For Cradle in general, it would be better for Malice to ascend. One less monarch means less hunger madra, which means weaker dreadgods.
...but then you see even in this story what happens when there is no Malice or Fury...and the hundreds of billions of people who live in Malice's lands are kind of fucked. For those people, Malice ascending is negative, because their entire extended families and everybody they know are about to be killed by the dragons who turn up or have their entire civilisation torn down. As mentioned in book 4, people mostly just get out of the way of the dreadgods.
Of course, as Taylor said, it's a prisoner dilemma. For the most good, you want all the monarchs to ascend at once but the incentives to be the one who stays behind are massive, and if somebody else is that person staying behind, well...
This doesn't even get into the thing where like Northstrider is staying until he can be a big enough fish that the Aiden don't just turn him into a grunt (in his view, even though he keeps putting it off), Shen's whole greed, manipulation thing or even Emris's thing about preserving language etc. Honestly, Northstrider might be counted as one of the most selfish because he doesn't have any territory that he holds other than a few semi-aligned people, and nobody is going to kill them off if he vanishes like Shen and the Dragon Monarch are going after the Akura or what happened with the Arelius when Tiberius died.
However, yeah, all the monarchs are flawed. I think its Eithan who basically said 'there was something wrong with people who just stayed behind', and its difficult to know if it is just a result of hundreds of years of resisting the world trying to eject you or personal issues that compound over hundreds of years of being in in their position.