Dmitry Fatakov

You can edit and clone any options of one blog and copy this items to the other blogs in multisite installation
<h3>License</h3>
WPMU copy options plugin is copyright © 2013 with <a href="http://www.gnu.org/copyleft/gpl.html" rel="nofollow ugc">GNU General Public License</a> by dmf_tuva.
This program is free software; you can redistribute it and/or modify it under 
the terms of the <a href="http://www.gnu.org/copyleft/gpl.html" rel="nofollow ugc">GNU General Public License</a> as published by the Free 
Software Foundation; either version 2 of the License, or (at your option) any 
later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY 
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A 
PARTICULAR PURPOSE. See the GNU General Public License for more details.

WPMU copy options

Daniel Westermann-Clark

By default, WordPress network usernames cannot contain anything but lowercase letters and numbers. This plugin adds network options to let you include hyphens, underscores, or uppercase letters, if desired.
Furthermore, this plugin gives you the option to allow email addresses as usernames, or to allow all-numeric usernames (e.g. “1234”).
Finally, this plugin lets you override the minimum length for usernames (which defaults to four characters).
To follow updates to this plugin, visit:
https://danieltwc.com/
For help with this version, visit:
https://danieltwc.com/2011/network-username-restrictions-override-1-0/

Network Username Restrictions Override

Does what it says!

Override restrictions on WordPress network usernames.

WPMU copy options vs Network Username Restrictions Override