I'm all for questioning conventions and not burying your head in the sand but if you want SE to listen, don't buy it. Because I mean we'd all like to pay less for things in general but in the end of you are willing to buy it for the price then SE did their job well and estimated a good selling price.

For me I look at the cost of other entertainment sources that I might use to replace FFXIV and I find the price acceptable. Others may not as this is a personal evaluation of the value of the game to you as an individual. If it is not worth the price tag to you... Why would you buy it? Because lower than expected sales is how you show them they misestimated their market. Not forum posts exclaiming it should be lower when it is in line with comparable pay to play MMO expansions. (Which is the best way to estimate market value right now)