Agility tai was better than GF because of it out-ranging it. Especially since there is a gameplay issue where the two hit combo can cancel the other taijutsu users two hit combo. I cannot, however say for certain now who is better after the balance changes. I do not play that much because of the poor optimization and kage abuse.
I think when looking at agi tai people also take into account the blood tonfas which really makes the mastery a tier above. If you have tonfas and fully invest in agi you will do extremely well 1v1. If you go hybrid you will not do good 1v1 at least in a tournament type setting. You need the extra room for the charges and projectiles.
People need to see that AGI Tai's range, longer combo, and speed > short burst dmg
tldr: AGI Tai was never weaker than GF.