A hard, complete reboot is an interesting concept but keep in mind though that even DC never actually went that far.
DC has a long history with reboots cause it has an even longer history with multi Earths, legacy characters and a fine tradition of writing themselves into a corner.
And man, it's quite an achievement to write a good crisis. It's not everyone who can write "Crisis on Infinite Earths". So yeah, i don't think that a complete reboot is something Marvel is ever going to do nor that it's something we should hope for.