No thanks. This is legalized RMT. It gives them more work to do and more spam for us. If the game was F2P I could understand it but then again Im playing FFXIV because it's not F2P.
This will only screw the market. New players will still need to pay which is kinda unfair for them since old veterans could play almost for free. There will be lots of people who will buy gil from RMT sites to buy this in-game sub effectively ruining the economy due to inflation rates. Not to mention greedy people will charge many millions for this.
This only benefits the RMT while it will divide the community. As we see this game succeeded as it is so why bother change it and risk losing customers plus all the work SE did to keep RMT at bay will be for nothing.