No, im not buying the pack, but that's because of technical issues with my pack purchases so far where I am not getting rewards I've paid for. I've also got no issues with game publishers and companies making money to make games, but it comes to a head when the gamer is buying a virtual item, which once they have bought it for real value, can then be rendered utterly worthless by the decisions of a producer (or worse, an accountant) in a publishers office somewhere.
Agree with you, this "game" is less P2W than others but it's a worrying trend in the industry in general that we as gamers are now accepting that it's OK to spend literally half the cost of a new console or a week's groceries on 3 virtual items that will be worth less than nothing in 2 weeks once someone decides they want to release new characters. There should be consumer rights for this stuff to protect what you pay for, regardless of whether it's virtual or not. Buying exp boosts for cash is one thing, but having your characters rendered worthless by dev changes is another. It's underhand when real money is involved in cultivating those character abilities and synergies.
Don't get me wrong, I know what I am into 100% and have no complaints; I agreed to the EULA just like everyone else but it doesn't mean I have to like it when I spend $100 on crystals and coins to level up a character only to have a dev make that character (and others) worthless. It's playing on people's competitive nature and the publishers know that power gamers will start dropping more real cash to get the flavour of the week heroes levelled up. Then the cycle repeats. Publishers get rich. Gamer with disposable income doesn't really care too much until he realizes that over a month he's dropped $500 on some "game" and actually has nothing tangible or meaningful to show for it. (Admittedly, at this point I am now off topic and ranting about the whole In-App purchase/pay to win approach that game companies are taking, so please disregard)
Just wait until Game Devs catch on to the software as a service model for mobile devices and we al have to pay monthly subs for our mobile games!!!!