378.56 is on the way. Here is the changelog:
Spoiler: Cahngelog
378.56 (xx-xxxx-2015)
- NEW: Merged with GPL 9177.
- NEW: Support for Russian ISP Telenet (code by theMIROn)
- NEW: ipset support in dnsmasq (patch by ryzhov_al)
- NEW: default loglevel is now configurable and defaults to
5 (notice) instead of 0 (emergency)
- NEW: local syslogd loglevel is now configurable through the webui.
- NEW: Support for extra-certs in OpenVPN
- NEW: Editable DHCP static leases list, virtual servers, port triggers.
- NEW: IP addresses on the Network Service Filter page can now be
subnets in CIDR format (i.e. 10.0.0.0/24)
- CHANGED: Updated miniupnpd to 20150723 snapshot
- CHANGED: Updated openvpn to 2.3.8
- CHANGED: Updated dropbear to 2015.68
- CHANGED: Support up to 5 different OpenVPN clients (to match Asus)
- CHANGED: Maximum openvpn policy rules reduced from 128 to 100, fewer
priority slots wasted in the RPDB tables (could have been a
problem with the increase in the number of supported clients)
- CHANGED: Improvements to VPN Status page
- CHANGED: Connection failure reason shown on the OpenVPN client
configuration page.
- CHANGED: Updated minidlna to 1.1.5.
- FIXED: Router crash when an invalid or corrupted DH parameter
is used on an OpenVPN server configuration.
- FIXED: 2.4 GHz temperature would be missing on the Sysinfo
page when disabling the 5 GHz radio on the RT-AC3200.
- FIXED: Max tracked connection limit wasn't user-editable
- FIXED: Resource leaks in ez-ipupdate if an update failed
- FIXED: Networked printers coming out of sleep every time
networkmap queried their LPR service
- FIXED: Resource leak in networkmap when scanning for
printer servers
- REMOVED: Regulation mode setting on Wireless -> Professional.
This can't be adjusted anymore, as it was moved to
a closed source component.

378.56 beta 1 XWRT for R7000 has been released:
Download