There was a 2e fighter kit for savage baronies or red steel (not 100% on the name) that turned them into a type of paladin with spell access, no reason why a 2e kit couldn't have done something for the wizard that removed the spellbook and provided them with sorcerer like spell access.I would like to see you try something like that, within the confines of 2e design that is. No kit ever modified a base class on such a fundamental level -at most the minstrel that opened the bard class to all elves -
Just a sample of opinions from this one forum:
Every time a "we don't need a sorcerer" comes up, "the wizard is generic enough to cover for it" is implied...
Also, the wizard can be used as a sorcerer-like class, I've done it and it works fine. I don't even need a replacement for the loss of the spellbook but, if I was going to merge the classes together into a single class with different origins then I would look at ability replacements.