Back in late WOD, they made it so old speed buffs no longer worked. Like the meta gem, jewelcrafting trinket and the enchants. However, I tried them out a while back and found out the “Minor Speed Increase” on boots worked again. It gives 10% movement speed but, only works on old boots. So, I use it with the “General’s Leather Treads” boots(Horde lvl 60 PVP boots, the Alliance is Marshal bla bla I think) which also increase Sprint’s duration by 3s. Then just have a macro that swaps those boots with your main boots and now you have a little speed increase and Sprint duration increase whenever you’re out of combat. Say if you want to sneak somewhere a little faster, maybe.
In any case, don’t let Blizzard know the enchant is working again.