We’re approaching this from opposite arenas; to me, the fact that Post-Crisis’s *longest-lasting successes* by the time Flashpoint rolled around were the properties that were the least rebooted means the problem isn’t the stuff that wasn’t rebooted - it was the reboot itself, in the way it was implemented and enforced. Flash, Green Lantern, Batman and others excelled because they could keep momentum and changes from the Pre-Crisis era, and were flexible enough to make some changes, but ignore changes or lore that weren’t working out... whether they came from before COIE or after.
Post-Crisis *DID* work... for those franchises that got a flexible approach to their continuity attached to marketing.
Meanwhile, the fact that the New 52 tried harder reboots on Flash and on the Batfamily and that failed shows that ordering a hard reboot is going to fail - long lasting continuity changes are really just people liking new stories, which depend more on having good creators and marketing than it does on erasing contrite and forbidding it’s usage.
Don’t dump good in pursuit of perfect... particularly in a niche marketplace trying to become mainstream again.