Well im playing pandawow since 2014.. at 5.4.2 season and i wanted to give some ideas..
1- Add some WoD mounts, will be great, dont you think? Some people are bored from MoP mounts.
2- Add Elite set in xFun , also x100 had it some period
3- In website > buy items > transmogs, create things like Warr tier 1 transmog, War tier 1 transmog(recolor) etc.. already exist items pack but they are little useless xd cuz sometimes in the packs are different color parts of transmog..xd
4- Add 1vs1 arenas
5- Take your deleted characters back but with some1 using same name.. take them back for 1 bonus and you can change name.
That are my ideas, what you think?