If Manu went to the Lakers, he could probably start at PG. If Phil is still there, he loves big PGs. Converted Ron Harper to PG. Brian Shaw. I think Phil would like to play Shannon Brown more at PG but he's too shot happy. Manu would be great playing PG for the Lakers. I think that's why there's also a chance T-Mac goes to the Lakers to play PG for them next year.
your conclusion is right but reasoning faulty ...Brown is a crappy ballhandler maybe only slightly better than ariza was last year so as PG even in the triangle he is bad fit. he could improve but i doubt it by much ...

Manu would be perfect.
harper and shaw were all good ballhandlers at the SG spot
Brown is Sf in a SG body ...