I agree it is minor, but if it is completely meaningless, why not remove it? This does quite literally and indisputably move down the "pay to win" path. If it is OK to pay to level your auto rifle faster, maybe it is OK to pay to level your subclass faster. If it is OK to pay to level your subclass faster, maybe it is OK to pay to go up levels faster. If it is OK to pay to go up levels faster, maybe it is OK to pay for better weapons or all-new subclass abilities others don't have. Even if the Bungie employees behind this have a strong belief about keeping this stuff at a certain threshold, the money people are likely to keep looking for new revenue streams and pushing the limits just a little bit at a time until there are no limits. It is easiest to defend a clear, obvious line than a fuzzy, opinion-based line. "I oppose pay to win" is a clear, obvious line. "It is just leveling an auto rifle" is a fuzzy, opinion-based line.