This is good, because this way the thing will drop, people will post about it for a week, and it will vanish into obscurity for all but the most devoted of the Snyder Cult. The miniseries approach would have kept it popping up in the discourse for a full month as each episode dropped. Better to get the shitshow over with all at once and move on.
Good lord this can't be a real thing anyone has said. Christ that movie is eternal trash.
He was always cutting it as a four hour film, as the limited theatrical release was planned that way. Splitting it up into a four part series was a way to keep people coming back to the app once a week for a month. This move means that either Snyder decided he'd rather have it seen as one whole chunk or that WB/HBO doesn't think it's strong enough to keep people coming back four weeks in a row and the numbers will be better as a singular launch. I'm willing to bet both of those things are true, frankly.