Firstly, let me make it clear that the devs said in their future DLC plans that they are only “exploring” this concept.
However, it should be made clear to them well beforehand that even considering adding XP and/or credit boosts for Platinum currency is unacceptable.
They stated earlier in the post, “the Battleborn Marketplace offers players the option to use earned or paid in-game currency to enhance their game experience without affecting gameplay.” Which at the moment is true with only skins, taunts, additional loadout slots etc. available. The majority of people who are willing to accept micro-transactions in a full price game are ok with features such as these because they do not affect gameplay or player power.
However, no matter which way they try to spin it, XP, and credit directly affect gameplay, and player power. Credits can be used for loot boxes, which directly affect player power. XP unlocks loot boxes every 5 Commander levels, and unlock helix options for characters (many of which are vastly superior to the original options) thus directly affecting player power.
Progress such as this in a full priced game should be there solely as a game feature, and for retention; not to be monetised. Free-to-play games monetise aspects like these because that is how they make money in addition to cosmetic options.
If GBX is unhappy with the credit or XP earning system (I know people will always want faster XP and credit, so it’s a balance to be had), then they should look at other options. There are plenty of ideas to do this like increasing the frequency of bonus XP/credit events (which have the added bonus of incentivising people to play), improving the current First-Win-Per-Day reward to be a set, worthwhile amount rather than just 10% of what you earned in the match (again incentivising play). Possibly even tweaking how much XP/credit is needed for things.
Credit, and XP will always directly affect gameplay, and player power. So, in a full priced game like Battleborn adding boosts to micro-transactions should never be seriously considered, let alone implemented. GBX, leave Platinum for cosmetics, and give us engaging reasons to play to earn more credit, and XP.