As someone who has played various pvp systems on various games, I feel that the pvp system in ffxiv would be more enjoyable and draw in more players if they revised the ranked rewards system. I've noticed its gone from a top 200 player system to a top 100 player system which requires the player to reach those ranks to get the season reward (mounts, glamour, etc.).
One of the problems I see with this system is that players with multiple accounts that excel in pvp tend to push out other players chances at getting that top 100 spot due to wanting to reach diamond on every data center. Some such players tend to only play on their alternate accounts only for ranking up in pvp which leads to such rewards collecting dust instead of going to someone that might get more use showing their rewards within their data center. If the rewards were account wide instead of being locked to one data center, this could free up some chances for other players to get their rewards.
A better solution that I think would work however would be if the rewards system was based on individual ranking instead of a top number of players. An example would be to have the ranked seasonal reward be given to all players who reach Gold or above, similar to how most pvp systems distribute rewards to their players. This would relieve the stress of checking that top 100 placement as well as draw in more players who want to try it out to reach the ranked rewards. This could increase the player base for ffxiv's pvp system and allow for the system to be expanded upon further with new rewards and events for those that stick around.
I for one would like to enjoy ffxiv's pvp more but apart from doing daily challenges to work towards achievement mounts, I find it very demotivating to work towards getting placed in a top 100 leader board for a seasonal mount just to get pushed out by multiple professionals with their alt accounts, win traders, and boosters who get paid to increase the rank of their customer. If I got more than a title for putting forth such effort and reaching platinum, I would play in every ranked season.