It is the team's responsibility to sort out their relations with clans and make alliances. If blue team feels they are outnumbered, they should reach out to communities and invite players to their cause.
Each clan/player has the freedom to choose their team. The whole point of diplomacy will be null and void if the teams are fabricated by the management.
There are still a lot of players and clans that have not aligned yet.
NxS, DnA, FZ, NK, TpS, =VK=, [VK], R2x, VLK, CO, TZK, DV, [N]
Heck load of clan less players in LWs and XE.
A Vicewar invitation has been sent to most of them, but Blues should take some initiative and get their alliance.