As it stands very few people do FATEs, and dungeons only reward Company Seals when using Roulette. This makes obtaining Seals for use on restat books a chore that you have to go above and beyond out of your way to obtain.
The problem is compounded by the fact that only lv50 players would ever want to restat themselves to try new builds (you no longer have a reason to do FATE or Roulette at 50 because Crystal Tower exists).

It is obvious that removing gil from the system is a high priority for the dev team,
so letting us buy restat books would be a very nice addition!

It may be useless for DPS, but for Tank/Healer (SCH being forced to split spec if they want to play SMN) it is much more valuable.
I would gladly spend 1-5k gil trying out new stat set ups on WAR/PLD, or a smaller amount (100g-500g) to restat myself every time I switch between SCH and SMN (Please for the love of all that is holy change this though!)