I think it would make it easier for people. I’m very much for normalizing terms like cis, trans, non-binary, etc, but just putting a lone term without clarification in front of players who may not know them brings problems as we see.
Terms for sexualities are more well known (at least by those that identify by them) and people are always happy to see people trying to include them, while using the correct term. Though if you really want to go down that road you also could add demi- and greysexual…
We honestly have many discussions about this topic on the forum you may want to look at:
Writing asexual and aromantic characters
Writing good characters with marginalized identities
How important is sexuality and gender
What about poc (not about sexuality, but maybe also for your interest)
Also I thought again about your idea to vary the description of characters based on the chosen sexuality and…I’m not really sold. I’m pan for example and I always hear that explanation of some people that pansexuals either are gender-blind or attracted solely on personality, and that’s absolutely not my expirience? And that’s something I also heard from a bunch of other people that are pan. I certainly have a type I prefer, for both personality and physical looks, and it feels weird to say I would not care for gender, for something that the person I can be attracted to may cares very much about. Gender is just no exclusion argument for attraction for me, that’s all. So…uhm if I’m completely honest you saying pansexual would focus more on personality feels…dissonant.