While you can't formally "propose" using this forum, it's a good spot to collect the details all in one place and get some feedback. I personally have no skin in this particular game, but I would suggest you find a stable place where you can post some samples and link them here. (If anyone's done a print representation of these, those samples would be the most interesting).
If you have credentials in the field, would be good to mention those as well. Likewise if you, for example, work in contact with the likely user community eagerly awaiting the ability to create texts with these characters. (The characters may exist, but if nobody plans on using them...).
People with real opinions (well-founded or not) should show up shortly. :D
(SVG is something that's of little interest - not something that figures in the character encoding process as it is currently run - if you are curious how formal proposals are done, if you want to eventually submit one, see the home page under "Proposed Changes / Submitting Character Proposals"