Here's hoping for. .......
1) Spell design rules
2) Proper reagents rules in regards to refined and radical reagents, orichalcum, exotic telesma and unique radicals, also a revisiting of artificing.
3) Astral security section with updated rules for fab bacteria, guardian vines, biofiber. ....etc.
All of the above were things found in previous editions' magic book ( at least 3rd and 4th for most of it ), but not in street grimoire for some reason.
Also expanded dark magic would be great yes.