How can you go wrong with the delicious Tuesday Weld in the cast? So yes, I think had she continued as a semi-regular in the cast it would have been fantastic. And they still could have continued to rotate hot female guest stars in as other love interests for Dobie like they did in Season 1 also.
Had this occurred, then by extension, I think Zelda's role would have been diminished.
I hear that Tuesday was forced out because she was too sexy.
That sounds more like a reason for trying to make her stay, LoL.
Someone made a bad decision then.