The Weaver class in the Invisible Sun RPG is very similar to Saga Sorc, but better.
(It is however the result of a house rule, not RAW or a reasonable interpretation of rules that lends itself to be reproduced)
It was pure RAW, nothing in the rules state that different magical traditions have the exact same verbal or somatic components, so in the particular character’s case they had different sounds and hand movements than the ‘norm’, but still had them.
Besides, never let minor rules get in the way of a cool character concept.
That said, to ask a question, receive an answer and give a ‘not RAW’ response
hints of moving the goal posts ex post facto, or you were trying to ask a question that could only be answered ‘correctly’ one way, aka a
gotcha question.
My 3E-Fu, is waning, but even a ‘low’ Cha Sorcerer still needed enough Cha to cover the adjusted spell slot level after applying the original type metamagic feats, ( not the
Sudden metamagic feats introduced later), so a 13 CHA Sorc, throwing 5th level slot metamagic adjusted spells, is if my memory is correct, not RAW.
What are exactly these options and themes you speak of? I'm sorry if I haven't understood you, but I haven't read any of them explicitly told.
I’m going to use the XGE tables “ I became a Wizard because” or “I became a Sorcerer because” tables as an example of what I was expressing poorly.
The Sorc tables has entries like: “on the night I was born all the milk in the house soured, and the windows frosted over”
and the Wizard has entries like: “ you got lost in the woods and found a hermit to teach you magic”.
Prior to the Sorc being a separate class, either type of background from the tables would and could be used by Magic User/ Wizard characters.
Now the system is arguably trying to silo off backgrounds to either Wiz or Sorc, that would have been shared in the past.