Ongoing expansion and customization of it is something we are looking to do certainly by Dragonflight, possibly before then is rolling a lot of the white and grey quality items into the transmog system so that you can choose from a lot of simpler, humbler civilian attire-type looks. We want to keep adding in more options for customization and self-expression.
They are looking to roll out grey and white items for transmog, maybe before Dragonflight even launches.
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Yeah, that's also a good idea. Or even for example if they add valor back in. Say Valor has a 1k weekly cap. 250 or 500 valor gives you a rep token. If you are done using valor for the tier, you could send rep to alts, or use it on your main to farm paragon cosmetics faster.
Even if rep isn't account wide, I think every character on your server once exalted and farming paragon rep, it should be account wide paragon rep.