What's wrong with a "paragraph" as you call it, your sig at the moment would be easy peasy, just separate each item with a comma & a single space, if you want to add more, at present there'd be a problem, I admit, due to the limit of five lines, of course it's your choice, but can I just ask why you want so much stuff in your sig?, I don't want to be a damp squib, but personally, I can't see your request getting off the ground.
You mean that the point is that ArrizX is pressing for change, rather than just simply rearrange his present sig, I see now, good luck with your efforts.
i don't think colors should be allowed, but the justify tags and the small font would be great, it's not like it's hard to ask or impeding on the look much at all.