I can understand the offense to the term "play". There were these "guides" here on Eden for a while that referred to the "sex games lesbians play." I hated those.
My current partner (FTM) does not find that particular category term so offensive, but I think it is because he (and I) are comparing it to the previous non-inclusive categories.
I agree this is a fine-tuning change Eden could make in terminology.
As far as including more passing items... I'm not sure this is the best place for binders, water bras, etc. The difference is that, at least in my personal experience, packing cocks are more of a sexual experience than a passing assistance. Now that I've said that - I will also play my own devil's advocate and say that with the vast number of products Eden already carries it shouldn't be too hard to explain the collection to include the suggested items.
Mostly I just wanted to say I agree with the suggestion of changing the term to "gender expression", but that I also am still very proud of Eden for the changes I have already seen it make in recent months to make more people feel included.