Figured bass: Transitus irregularis slash

[lfm83]

Carl Philipp Emanuel Bach ("Versuch" vol. II 1762, Ch. 1, § 76) demonstrates several glyphs to designate bass figures given relative to the right-neighbouring bass note, useful for accented passing notes in the bass:

He declares the slash (variant 2) to be the best. This symbol is also being employed by Emanuel Aloys Förster ("Anleitung zum General-Bass" 1804, "Practische Beyspiele" ~1820) with the same meaning:

(Note the differing spacing/positioning conventions in Förster's two examples.)

Would it be sensible/possible/desirable to add

• the slash symbol,
• Bach's other variants (the "zero", the "half zero" and the "m" which looks like a trill)

to the standard? As far as I can see, they are not included at the moment.