There are two player development packs. I saved up and got them in my first season. They save you maybe 150 xp on everything else you buy for each one you get. imo not worth it. I'm still saying to myself "was it really worth it getting 300 xp off things for the 100,000 xp I spent? divide 100,000 by 300 and that's how many attribute increases you would have to do to get your xp back from it. or 50,000 by 150 if you just buy one.