Cool.
Developer, if you're reading this, be very very careful how, keyword, how you listen to player's advice. When this player says "it would also devalue the time I've already spent unlocking these", this is the real value in his advice, its his personal genuine true objective feelings on the matter. This is how most players advice will benefit you, not from what they're telling you to do (which are largely just emotionally driven justifications for what they personally want to see from the game), but rather what they genuinely personally say they want. Now player's personal feelings don't necessarily always need to be addressed, especially if its a fringe personal feeling that very few players will likely reiterate like in this case, but in the case of many players reiterating the same feelings (and not just a very vocal minority), it probably is something you should genuinely consider. I'm not saying the emotional "logic" that follows a players justification for their personal desires can't be correct (everyone gets lucky every now and then, and when it actually is the case that their feelings are a product of an actual genuine issue with the game, the emotional justification that accompanies their feelings towards said genuine issue will actually be correct), but this is the exception, not the rule. Not everyone is bright enough or experienced enough in game development to tell you what the right course of action is, but even a 5-year-old can tell you how they truly feel about something. Its ultimately up to you what you do with that information.