It may be good to let the dust settle a bit first
Unless those deindexed sites fixed what was wrong, applied to google for reinclusion and got reincluded it could take weeks to a month. I'd much rather the dexindexed sites be removed so no one posts to them accidentally. It's simple to add them back if they get reindexed.
My opinion is that 95% or more of the domains that got deindexed will ever get back in. For those that do get back in, it will be the exceptions.