Good to hear that free transfers will be offered! I am not surprised about the Legacy/non-Legacy server limitation, but it is still disappointing. Hopefully they will allow it sooner than the original tentative estimate of 6 months.

Though it is kind of funny, if you think about what the notice says:

A benefit of transfers is that you can play with your friends.
Excalibur and Hyperion are really crowded (that is 2/4 US Legacy servers).
They warn there may be downsides to transferring to a really crowded server.
They suggest that groups of friends move to an uncrowded server.

Based on this, I conclude that friends who are separated across crowded US Legacy & non-Legacy servers should all move to Sargatanas or Balmung! (I'm teasing, mostly )

Really, Excalibur may be crowded but it is a fine server. I prefer things a bit quieter though so may give Masamune a try.