I was thinking about this today as I was fate grinding for atma.

Would it be possible to trade Grand Company seals for Allied seals?

I think that 1,000 GC seals for 10 Allied seals with a weekly cap of 5,000 GC seals for 50 Allied Seals would be feasible.

This would allow players, like myself, to spend GC seals on something other than ventures and at the same time allow them to obtain a few Allied seals.

Just some food for thought