Nope, they did reform. Just not at the Cheorwon Hive.
Should have added this part eariler but posted too fast at work.
#38 Continental Fighters
http://muvluv.wikia.com/wiki/Continental_Fighters
Spoiler for Valkyries forever:
Listening to two of her Storm Vanguards arguing and exchanging insults on the net brought a very familiar feeling of nostalgia to Munakata. She remembers the face and voice of her commander who died that fateful day, plus many others, and couldn’t help but laugh at the current Valkyrie Squadron roster manning list. She admitted that to her knowledge, the board was not partial in picking pilots for the
newly reactivated Valkyrie squadron, and that it just so happen that after all the evaluation, pilot assessments, and a rigorous selection process, that a certain Isumi sister was selected and assigned to Isumi’s Valkyrie unit, and partnered up with Suzumiya Akane, as a Storm Vanguard no less. Fate sure has its ways of rewarding her, it seems. Suppressing her smile, Munakata ordered her troops.
But i'll give you that though the Valkyries were reformed, they might not be called the 'wink wink hint hint' A-01 unit... After all, that unit never existed, no siree... never heard of them F-15SEJs either...no such unit...